Rails - Jan 2012 - I really don't know hot to set an extra attribute of a join model.

Scuse me but, as the subject says, I''m not be able to set an extra
attribute of a join model.
Situation is:

class Company < ActiveRecord::Base
 has_many :managements
 has_many :managers, :through => :managements

class Manager < ActiveRecord::Base
 has_many :managements
 has_many :companies, :through => :managements

class Management < ActiveRecord::Base
 belongs_to :company
 belongs_to :manager

 ROLES = ["Rappresentante legale", "Titolare"].freeze

Management has an extra attribute :role and the values are those in
the ROLES array .

I want
create a Company;
then add a Manager but, at the same time, set the :role attribute of
Management join model.
The form for creating a new Manager is:

- args = @company.nil? ? [@manager] : [[@company, @manager], {:remote =>
true}]
= semantic_form_for *args do |f|

 = f.inputs :name, :surname, :fiscal_code, :city, :zip_code,
:address, :street_number, :tel, :email
 = f.semantic_fields_for :managements do |management|
   = management.inputs do
     = management.input :role, :as => :select, :collection =>
Management::ROLES

 = f.buttons :commit

I don''t see the role field.

Manager controller is

def new
   @company = Company.find(params[:company_id])
   @manager = @company.managers.build


def create
 @company = Company.find(params[:company_id])
 @manager = Manager.new(params[:manager])
 @manager.company_ids = @company.id

I can add a Manager to @company but I don''t know how to set the :role
attribute.

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On Thu, Jan 12, 2012 at 12:22 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> Scuse me but, as the subject says, I''m not be able to set an extra
> attribute of a join model.
> Situation is:
>
> class Company < ActiveRecord::Base
>  has_many :managements
>  has_many :managers, :through => :managements
>
> class Manager < ActiveRecord::Base
>  has_many :managements
>  has_many :companies, :through => :managements
>
> class Management < ActiveRecord::Base
>  belongs_to :company
>  belongs_to :manager
>
>  ROLES = ["Rappresentante legale", "Titolare"].freeze
>
> Management has an extra attribute :role and the values are those in
> the ROLES array .
>
> I want
> create a Company;
> then add a Manager but, at the same time, set the :role attribute of
> Management join model.
> The form for creating a new Manager is:
>
> - args = @company.nil? ? [@manager] : [[@company, @manager], {:remote =>
> true}]
> = semantic_form_for *args do |f|
>
>  = f.inputs :name, :surname, :fiscal_code, :city, :zip_code,
> :address, :street_number, :tel, :email
>  = f.semantic_fields_for :managements do |management|
>   = management.inputs do
>     = management.input :role, :as => :select, :collection =>
> Management::ROLES
>
>  = f.buttons :commit
>
> I don''t see the role field.
>
Could you explain where you do not see the "role" field,

Could you show us the params.inspect when submit is clicked.


>
> Manager controller is
>
> def new
>   @company = Company.find(params[:company_id])
>   @manager = @company.managers.build
>
> def create
>
# place here logger.debug params.inspect
# or puts params.inspect
# or raise params.inspect

>  @company = Company.find(params[:company_id])
>  @manager = Manager.new(params[:manager]) ## [A]
>  @manager.company_ids = @company.id ## [B]
>
Try not to manipulate _id yourself. Always better to use the
association functions.

Is that company_ids (with a ''s'') a typo error ?

Here (in the ''create'') it does make sense to say as in the
''new''
method:

 @manager = @company.managers.build(params[:manager])  # [C]

this replace lines [A] and [B].

Now for the attribute on the newly created management record ...

After line [C] is executed, what do you when looking for

@manager.managements

If you are lucky, then there is exactly 1 record there and you could
try to write

@manager.managements.first.role = # the role that you read from the params
hash

I don'' know if you could get multiple @manager.managements entries at
this
stage (because in the database, there could certainly be muplitple, unless
you
had a unique composite key on
[managements.manager_id, managements.company_id] which could make sense.

HTH, but not entirely sure,

Peter


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If in the controller I put:  (I''m using inherited resources)
like you sugggest

def new
    @company = Company.find(params[:company_id])
    new!
  end

  def create
    puts params.inspect
    @company = Company.find(params[:company_id])
    @manager = @company.managers.build(params[:manager])
    create!
  end

Then a new manager is created but it is not associated at any Company,
I think I have explicity do
@manager.company_ids = @company.id in the controller.

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Here are params:

{"utf8"=>"✓",
"authenticity_token"=>"RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
"manager"=>{"name"=>"q",
"surname"=>"",
"fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
"address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
"commit"=>"Crea Amministratore",
"action"=>"create",
"controller"=>"managers",
"company_id"=>"6"}


Started POST "/companies/6/managers" for 0:0:0:0:0:0:0:1 at 2012-01-12
16:58:49 +0100
  Processing by ManagersController#create as JS
  Parameters: {"utf8"=>"✓",
"authenticity_token"=>"RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
"manager"=>{"name"=>"q",
"surname"=>"",
"fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
"address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
"commit"=>"Crea Amministratore",
"company_id"=>"6"}

As you see i have company_id => but the association is not created, is
created only a new Manager but with no Company association.

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On Thu, Jan 12, 2012 at 5:02 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> Here are params:
>
> {"utf8"=>"✓",
>
"authenticity_token"=>"RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
> "manager"=>{"name"=>"q",
"surname"=>"",
> "fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
> "address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
> "commit"=>"Crea Amministratore",
"action"=>"create",
> "controller"=>"managers",
"company_id"=>"6"}
>
>
> Started POST "/companies/6/managers" for 0:0:0:0:0:0:0:1 at
2012-01-12
> 16:58:49 +0100
>  Processing by ManagersController#create as JS
>  Parameters: {"utf8"=>"✓",
>
"authenticity_token"=>"RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
> "manager"=>{"name"=>"q",
"surname"=>"",
> "fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
> "address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
> "commit"=>"Crea Amministratore",
"company_id"=>"6"}
>
> As you see i have company_id => but the association is not created, is
> created only a new Manager but with no Company association.
>

You are correct (and I learned something). In this many_to_many association
a build and a later save on the newly build object, seems to NOT create
the intermediate association object in the database ... (this works as I
would
expect in a straight has_many, but seemingly not in a has_many :through
...).
Using a ''create'' resolves that problem, but that means you
cannot delay the
saving to database to one consolidated save at the end, as I prefer to do.

Some code:

002:0> Company.create
  SQL (11.6ms)  INSERT INTO "companies" ("created_at",
"updated_at") VALUES
(?, ?)  [["created_at", Thu, 12 Jan 2012 23:28:57 UTC +00:00],
["updated_at", Thu, 12 Jan 2012 23:28:57 UTC +00:00]]

004:0> @company = Company.find(1)
  Company Load (0.2ms)  SELECT "companies".* FROM
"companies" WHERE
"companies"."id" = ? LIMIT 1  [["id", 1]]
=> #<Company id: 1, created_at: "2012-01-12 23:28:57",
updated_at:
"2012-01-12 23:28:57">

006:0> @manager = @company.managers.build()
=> #<Manager id: nil, created_at: nil, updated_at: nil>

007:0> @manager.save!
  SQL (0.6ms)  INSERT INTO "managers" ("created_at",
"updated_at") VALUES
(?, ?)  [["created_at", Thu, 12 Jan 2012 23:30:25 UTC +00:00],
["updated_at", Thu, 12 Jan 2012 23:30:25 UTC +00:00]]
=> true

## This does NOT save the intermediate management record :-(

008:0> @manager = @company.managers.create()
  SQL (0.5ms)  INSERT INTO "managers" ("created_at",
"updated_at") VALUES
(?, ?)  [["created_at", Thu, 12 Jan 2012 23:30:42 UTC +00:00],
["updated_at", Thu, 12 Jan 2012 23:30:42 UTC +00:00]]
  SQL (0.8ms)  INSERT INTO "managements" ("company_id",
"created_at",
"manager_id", "role", "updated_at") VALUES (?, ?,
?, ?, ?)  [["company_id",
1], ["created_at", Thu, 12 Jan 2012 23:30:42 UTC +00:00],
["manager_id",
2], ["role", nil], ["updated_at", Thu, 12 Jan 2012 23:30:42
UTC +00:00]]
=> #<Manager id: 2, created_at: "2012-01-12 23:30:42",
updated_at:
"2012-01-12 23:30:42">

## but this does save the intermediate management record :-)

009:0> @manager.managements.first
  Management Load (0.3ms)  SELECT "managements".* FROM
"managements" WHERE
"managements"."manager_id" = 2 LIMIT 1
=> #<Management id: 1, company_id: 1, manager_id: 2, role: nil,
created_at:
"2012-01-12 23:30:42", updated_at: "2012-01-12 23:30:42">
010:0> @manager.managements.first.role = "test role"
  Management Load (0.3ms)  SELECT "managements".* FROM
"managements" WHERE
"managements"."manager_id" = 2 LIMIT 1
=> "test role"

## Huh, Y U Reload ? (this is a different problem)

011:0> @manager.managements.first.save!
  Management Load (0.3ms)  SELECT "managements".* FROM
"managements" WHERE
"managements"."manager_id" = 2 LIMIT 1
=> true

## Huh, Y U Reload again ... and now save a pristine management record
without my role assigned ?
## I could not reproduce this behavior ... never seen this before.

013:0> management = @manager.managements.first
  Management Load (0.3ms)  SELECT "managements".* FROM
"managements" WHERE
"managements"."manager_id" = 2 LIMIT 1
=> #<Management id: 1, company_id: 1, manager_id: 2, role: nil,
created_at:
"2012-01-12 23:30:42", updated_at: "2012-01-12 23:30:42">
014:0> management.role = "test role"
=> "test role"
015:0> management.save!
   (0.4ms)  UPDATE "managements" SET "role" = ''test
role'', "updated_at" ''2012-01-12
23:32:24.704538'' WHERE "managements"."id" = 1
=> true

# forcing management to be the same record

017:0> @manager.managements.first
  Management Load (0.3ms)  SELECT "managements".* FROM
"managements" WHERE
"managements"."manager_id" = 2 LIMIT 1
=> #<Management id: 1, company_id: 1, manager_id: 2, role: "test
role",
created_at: "2012-01-12 23:30:42", updated_at: "2012-01-12
23:32:24">
018:0> @manager.managements.first.role
  Management Load (0.3ms)  SELECT "managements".* FROM
"managements" WHERE
"managements"."manager_id" = 2 LIMIT 1
=> "test role"

And now, reading it back from the database yields the role.

Please not that the use of "first" here is dangerous, unless you make
sure
there is never
a double association record between the same combination of Company and
Manager.

Another problem, I do not see the "role" value anywhere in your
params, so
probably also
the form needs fixing somewhere ?

HTH,

Peter

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You have created and saved a Manager.
This create automatically a new Management and it is correct, but with
role => nil.
I want to assign a role to Management at the same time I create a new Manager.

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On Sun, Jan 15, 2012 at 5:36 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> You have created and saved a Manager.
> This create automatically a new Management and it is correct, but with
> role => nil.
>
Indeed that is at line 008 of my code above (triggering 2 * SQL INSERT)

And only in a second set of commands (013, 014, 015 above) I was
able to set the role for the "management" association record
(triggering
1 * SQL UPDATE)

> I want to assign a role to Management at the same time I create a new
> Manager.
>
I understand, but I was unable to find a solution that does it in 1 time...

HTH,

Peter

-- 
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On 15 January 2012 17:54, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org> wrote:
>> I want to assign a role to Management at the same time I create a new
>> Manager.
>
>
> I understand, but I was unable to find a solution that does it in 1 time...
And tha''ts my problem, reading other posts in internet it seems
impossible.
Perhaps the role can be set with a before_save in Management model but
how to use in Management model the params of the manager form?

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On Sun, Jan 15, 2012 at 7:25 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> On 15 January 2012 17:54, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
> wrote:
>
> >> I want to assign a role to Management at the same time I create a
new
> >> Manager.
> >
> >
> > I understand, but I was unable to find a solution that does it in 1
> time...
>
> And tha''ts my problem, reading other posts in internet it seems
impossible.
> Perhaps the role can be set with a before_save in Management model but
> how to use in Management model the params of the manager form?
>
I would not use before_filter for this.

Just do it in 2 separate saves.

1) build the manager indepedently
2) build the management with all associations and his role

Save them. You might be lucky to do @manager.save that
saves both of them if you had built the management with
the build on the association from @manager. Like this:

Pseudo code (untested)

@company = Company.find(params[:company_id]) # 1 FIND
@manager = Manager.new(params[:manager])
@manager.managements.build(:role => role, :company => @company)

If you''re lucky,

@manager.save # Check this in your rails console (for 1 or 2 INSERTs)

will also save the newly built management in 1 transaction and
you would not have to juggle _id variables manually.

HTH,

Peter

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On 15 January 2012 19:33, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
wrote:
> On Sun, Jan 15, 2012 at 7:25 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>> On 15 January 2012 17:54, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
>> wrote:
>>
>> >> I want to assign a role to Management at the same time I
create a new
>> >> Manager.
>> >
>> >
>> > I understand, but I was unable to find a solution that does it in
1
>> > time...
>>
>> And tha''ts my problem, reading other posts in internet it
seems
>> impossible.
>> Perhaps the role can be set with a before_save in Management model but
>> how to use in Management model the params of the manager form?
>
>
> I would not use before_filter for this.
>
> Just do it in 2 separate saves.
>
> 1) build the manager indepedently
> 2) build the management with all associations and his role
>
> Save them. You might be lucky to do @manager.save that
> saves both of them if you had built the management with
> the build on the association from @manager. Like this:
>
> Pseudo code (untested)
>
> @company = Company.find(params[:company_id]) # 1 FIND
>
> @manager = Manager.new(params[:manager])
> @manager.managements.build(:role => role, :company => @company)
I''ve tried something like this but the result in the managements table
is:

company_id => 1, manager_id => 1, role => nil
company_id => nil, manager_id =>1, role => "test"

It creates two records while I want:

company_id => 1, manager_id => 1, role => "test"

Is it really hard to do this with rails?

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On Sun, Jan 15, 2012 at 7:46 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> On 15 January 2012 19:33, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
> wrote:
> > On Sun, Jan 15, 2012 at 7:25 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >>
> >> On 15 January 2012 17:54, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
> >> wrote:
> >>
> >> >> I want to assign a role to Management at the same time I
create a new
> >> >> Manager.
> >> >
> >> >
> >> > I understand, but I was unable to find a solution that does
it in 1
> >> > time...
> >>
> >> And tha''ts my problem, reading other posts in internet it
seems
> >> impossible.
> >> Perhaps the role can be set with a before_save in Management model
but
> >> how to use in Management model the params of the manager form?
> >
> >
> > I would not use before_filter for this.
> >
> > Just do it in 2 separate saves.
> >
> > 1) build the manager indepedently
> > 2) build the management with all associations and his role
> >
> > Save them. You might be lucky to do @manager.save that
> > saves both of them if you had built the management with
> > the build on the association from @manager. Like this:
> >
> > Pseudo code (untested)
> >
> > @company = Company.find(params[:company_id]) # 1 FIND
> >
> > @manager = Manager.new(params[:manager])
> > @manager.managements.build(:role => role, :company => @company)
>
> I''ve tried something like this but the result in the managements
table is:
>
> company_id => 1, manager_id => 1, role => nil
> company_id => nil, manager_id =>1, role => "test"
>
> It creates two records while I want:
>
> company_id => 1, manager_id => 1, role => "test"
>
> Is it really hard to do this with rails?
>
It shouldn''t be ...

What happens if you try my code above literally in rails
console ? Of course not with ''params'' then but just with

@company = Company.find(1)
@manager = Manager.new()
@management = @manager.managements.build(:role => "Big chief",
:company =>
@company)

The @management that is built here, does NOT have all _id''s set (yet!),
but do not be misguided. Ask for

puts @management.manager
puts @manager.company
puts @manager.role

They should be present, all 3.

Doing a save on @manager.save will "probably" execute 2 INSERTs
(if only 1 INSERT is executed, you need to do @management.save
separately).

After that, the _id ''s in the managements record will also be set.

If you have time, try it out. I think that should work.

HTH,

Peter

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On 15 January 2012 19:58, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
wrote:
> puts @management.manager
puts @management.manager

=> nil
> puts @manager.company
It is @manager.companies:

irb(main):019:0> puts @manager.companies
[]
=> nil

> puts @manager.role
puts @management.role
Big chief

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On Sun, Jan 15, 2012 at 8:13 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> On 15 January 2012 19:58, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
> wrote:
> > puts @management.manager
>
> puts @management.manager
>
> => nil
>
OK, I get it.

That''s because we do not have the "inverse_of" relationship
in place.

But after a save, also this belongs_to should be OK.

You could add the inverse_of to have the
management belongs_to :manager available immediately

class Manager < ...
  has_many :managements, :inverse_of => :manager
...
end

Also, another :inverse_of (in the Management class) may even
resolve the original problem that the :through association is not
automatically saved after a build:

http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html
<quote>

  If you are using a belongs_to on the join model, it is a good idea to set
the :inverse_of option

  on the   belongs_to, which will mean that the following example works
correctly (where tags is

  a has_many :through association):

  @post = Post.first  @tag = @post.tags.build :name => "ruby" 
@tag.save

</quote>

that would be:

class Management < ...
  belongs_to :manager, :inverse_of => :managements
  ...
end


>
> > puts @manager.company
>
> It is @manager.companies:
>
Sorry, I made a typo there ...

  puts @management.company

That should certainly be present (wit''s explicitely assigned in the
build).


> irb(main):019:0> puts @manager.companies
> []
> => nil
>
Yes, that is logical at this point in the code (we have
only made the associaton object, but not done anything
on that association).

Maybe the inverse_of resolves this ??


>
>
> > puts @manager.role
>
> puts @management.role
> Big chief
>
That works ... 1/3 is not a high score ...

Could try the 2 modifications suggested above.

And do the same puts after @manager.save


@company = Company.find(1)
@manager = Manager.new()
@management = @manager.managements.build(:role => "Role", :company
=>
@company)

puts @management.manager
puts @management.company
puts @management.role

@manager.save
@manager.reload

puts @management.manager
puts @management.company
puts @management.role

Actually, I think that _after_ the save, it will be OK, even
without adding the "inverse_of" options.

I think we are getting closer,

Peter


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On 15 January 2012 21:01, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
wrote:
> On Sun, Jan 15, 2012 at 8:13 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>> On 15 January 2012 19:58, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
>> wrote:
>> > puts @management.manager
>>
>> puts @management.manager
>>
>> => nil
>
>
> OK, I get it.
>
> That''s because we do not have the "inverse_of"
relationship in place.
>
> But after a save, also this belongs_to should be OK.
>
> You could add the inverse_of to have the
> management belongs_to :manager available immediately
>
> class Manager < ...
>   has_many :managements, :inverse_of => :manager
Done.
> class Management < ...
>   belongs_to :manager, :inverse_of => :managements
Done.
> Could try the 2 modifications suggested above.
>
> And do the same puts after @manager.save
>
>
>
> @company = Company.find(1)
> @manager = Manager.new()
> @management = @manager.managements.build(:role => "Role",
:company =>
> @company)
>
> puts @management.manager
puts @management.manager
#<Manager:0xaeba3ff>
=> nil
> puts @management.company
puts @management.company
#<Company:0x1dc9b12c>
=> nil

> puts @management.role
puts @management.role
Role
=> nil
>
> @manager.save
> @manager.reload
>
> puts @management.manager
puts @management.manager
#<Manager:0x73785e0f>
> puts @management.company
puts @management.company
#<Company:0x1dc9b12c>
> puts @management.role
puts @management.role
Role


Wow!!!
Now with adding :inverse_of it seems to work :-)

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On Sun, Jan 15, 2012 at 9:31 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> On 15 January 2012 21:01, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
> wrote:
>
...
> > But after a save, also this belongs_to should be OK.
> >
> > You could add the inverse_of to have the
> > management belongs_to :manager available immediately
> >
> > class Manager < ...
> >   has_many :managements, :inverse_of => :manager
>
> Done.
>
> > class Management < ...
> >   belongs_to :manager, :inverse_of => :managements
>
> Done.
>
> > Could try the 2 modifications suggested above.
> >
> > And do the same puts after @manager.save
> >
> >
> >
> > @company = Company.find(1)
> > @manager = Manager.new()
> > @management = @manager.managements.build(:role => "Role",
:company =>
> > @company)
> >
> > puts @management.manager
>
> puts @management.manager
> #<Manager:0xaeba3ff>
> => nil
>
> > puts @management.company
>
> puts @management.company
> #<Company:0x1dc9b12c>
> => nil
>
>
> > puts @management.role
>
> puts @management.role
> Role
> => nil
>
> >
> > @manager.save
> > @manager.reload
> >
> > puts @management.manager
>
> puts @management.manager
> #<Manager:0x73785e0f>
>
> > puts @management.company
>
> puts @management.company
> #<Company:0x1dc9b12c>
>
> > puts @management.role
>
> puts @management.role
> Role
>
>
> Wow!!!
> Now with adding :inverse_of it seems to work :-)
>
OK, glad.

For clarity, I believe that after the

@manager.save

the results would also be OK _without_ the :inverse_of.

The only thing the :inverse_of does, is the fill in the "inverse"
association in memory, before the save. Once a save or
reload has happened, both associations (belongs_to and
has_{one|many} are always filled in).

Sorry that it took so long to get this fairly simple case to work.
I feel I was not very efficient at certain parts of this story ...

Peter

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I didn''t knew :inverse_of, now I read something about it.
But I can I set now the controller actions new and create?
This code creates two managers and not only one:

def new
    @company = Company.find(params[:company_id])
    @manager = Manager.new
    @manager.managements.build
    new!
  end

  def create
    @company = Company.find(params[:company_id])
    @manager = @company.managers.build(params[:manager])
    @manager.company_ids = @company.id
    create!
  end

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On Sun, Jan 15, 2012 at 9:43 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> I didn''t knew :inverse_of, now I read something about it.
> But I can I set now the controller actions new and create?
> This code creates two managers and not only one:
>
> def new
>     @company = Company.find(params[:company_id])
>     @manager = Manager.new
>    @manager.managements.build
>    new!
>  end
>
>  def create
>     @company = Company.find(params[:company_id])
>     @manager = @company.managers.build(params[:manager])
>     @manager.company_ids = @company.id
>    create!
>  end
>
What are the new! and create! methods?

Are the 2 entries created both in the create action? You should
certainly not see an INSERT in the logs during the new action.

Peter

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Yes you''re right, it works also without :inverse_of, sorry for my
mistake.
But I can''t do it work using the manager form.
Can you help me for another little piece?

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On 15 January 2012 21:49, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
wrote:
> On Sun, Jan 15, 2012 at 9:43 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>> I didn''t knew :inverse_of, now I read something about it.
>> But I can I set now the controller actions new and create?
>> This code creates two managers and not only one:
>>
>> def new
>>    @company = Company.find(params[:company_id])
>>    @manager = Manager.new
>>    -NPpDW1XWqP7zboGJfjnu6uyjaAAtfbygYKB5T7WKXak@public.gmane.org
>>    new!
>>  end
>>
>>  def create
>>    @company = Company.find(params[:company_id])
>>    @manager = @company.managers.build(params[:manager])
>>    -NPpDW1XWqP5wkoGAtB9Kcg@public.gmane.org_ids = @company.id
>>    create!
>>  end
>
>
> What are the new! and create! methods?
That because I''m using inherited_resources.

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This seems to work:

def new
    @company = Company.find(params[:company_id])
    @manager = Manager.new
    @manager.managements.build
    new!
  end

  def create
    @company = Company.find(params[:company_id])
    @manager = Manager.new(params[:manager])
    @manager.managements.build(:role=>params[:role],:company => @company)
    create!
  end

Am I correct now?

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On Sun, Jan 15, 2012 at 10:03 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> This seems to work:
>
> def new
>     @company = Company.find(params[:company_id])
>     @manager = Manager.new
>     @manager.managements.build
>     new!
>   end
>
>   def create
>     @company = Company.find(params[:company_id])
>     @manager = Manager.new(params[:manager])
>     @manager.managements.build(:role=>params[:role],:company =>
@company)
>     create!
>   end
>
> Am I correct now?
>
Possibly, for company and manager.

But the params you showed some time ago:

 Parameters: {"utf8"=>"✓",
"authenticity_token"=>"
RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
"manager"=>{"name"=>"q",
"surname"=>"",
"fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
"address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
"commit"=>"Crea Amministratore",
"company_id"=>"6"}

I did not see a

  "role" => "Something"

in there.

Have you changed your view to now also have a "role" input field that
is
returned upon submit?

Peter

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On 15 January 2012 22:11, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
wrote:
> On Sun, Jan 15, 2012 at 10:03 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>> This seems to work:
>>
>> def new
>>     @company = Company.find(params[:company_id])
>>     @manager = Manager.new
>>     @manager.managements.build
>>     new!
>>   end
>>
>>   def create
>>     @company = Company.find(params[:company_id])
>>     @manager = Manager.new(params[:manager])
>>     @manager.managements.build(:role=>params[:role],:company =>
@company)
>>     create!
>>   end
>>
>> Am I correct now?
>
>
> Possibly, for company and manager.
>
> But the params you showed some time ago:
>
>
>  Parameters: {"utf8"=>"✓",
> "authenticity_token"=>"
> RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
> "manager"=>{"name"=>"q",
"surname"=>"",
> "fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
> "address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
> "commit"=>"Crea Amministratore",
"company_id"=>"6"}
>
> I did not see a
>
>   "role" => "Something"
That''s because I didn''t have @manager.managements.build in the
controller.

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On Sun, Jan 15, 2012 at 10:15 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> On 15 January 2012 22:11, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
> wrote:
> > On Sun, Jan 15, 2012 at 10:03 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >>
> >> This seems to work:
> >>
> >> def new
> >>     @company = Company.find(params[:company_id])
> >>     @manager = Manager.new
> >>     @manager.managements.build
> >>     new!
> >>   end
> >>
> >>   def create
> >>     @company = Company.find(params[:company_id])
> >>     @manager = Manager.new(params[:manager])
> >>     @manager.managements.build(:role=>params[:role],:company
=>
> @company)
> >>     create!
> >>   end
> >>
> >> Am I correct now?
> >
> >
> > Possibly, for company and manager.
> >
> > But the params you showed some time ago:
> >
> >
> >  Parameters: {"utf8"=>"✓",
> > "authenticity_token"=>"
> > RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
> > "manager"=>{"name"=>"q",
"surname"=>"",
> > "fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
> > "address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
> > "commit"=>"Crea Amministratore",
"company_id"=>"6"}
> >
> > I did not see a
> >
> >   "role" => "Something"
>
> That''s because I didn''t have @manager.managements.build
in the controller.
>
I doubt it ...

What you get back in "params" when the "create" action is
called,
is a function of the code and view that is rendered by the "new"
action.

Changing the code in the "create" action cannot change the params
you receive when that "create" action is called.

Unless I totally misunderstood the way you would use "new" and
"create" ...

Anyway, does it work now, does that mean the params when entering the
"create" action now do have the correct "role" key in them,
than it is fine
:-)

HTH,

Peter

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On Sun, Jan 15, 2012 at 10:21 PM, Peter Vandenabeele
<peter-jNuWw7i2w7vf1GTOI5cn9A@public.gmane.orgm
> wrote:
> On Sun, Jan 15, 2012 at 10:15 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>> On 15 January 2012 22:11, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
>> wrote:
>> > On Sun, Jan 15, 2012 at 10:03 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> >>
>> >> This seems to work:
>> >>
>> >> def new
>> >>     @company = Company.find(params[:company_id])
>> >>     @manager = Manager.new
>> >>     @manager.managements.build
>> >>     new!
>> >>   end
>> >>
>> >>   def create
>> >>     @company = Company.find(params[:company_id])
>> >>     @manager = Manager.new(params[:manager])
>> >>    
@manager.managements.build(:role=>params[:role],:company =>
>> @company)
>> >>     create!
>> >>   end
>> >>
>> >> Am I correct now?
>> >
>> >
>> > Possibly, for company and manager.
>> >
>> > But the params you showed some time ago:
>> >
>> >
>> >  Parameters: {"utf8"=>"✓",
>> > "authenticity_token"=>"
>> > RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
>> > "manager"=>{"name"=>"q",
"surname"=>"",
>> > "fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
>> > "address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
>> > "commit"=>"Crea Amministratore",
"company_id"=>"6"}
>> >
>> > I did not see a
>> >
>> >   "role" => "Something"
>>
>> That''s because I didn''t have
@manager.managements.build in the controller.
>>
>
> I doubt it ...
>
> What you get back in "params" when the "create" action
is called,
> is a function of the code and view that is rendered by the "new"
action.
>
> Changing the code in the "create" action cannot change the params
> you receive when that "create" action is called.
>
> Unless I totally misunderstood the way you would use "new" and
"create" ...
>
Which is quite possible if Javascript is involved ...
I was only thinking of the simple classic case of
index => new => create => show

Peter

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On 15 January 2012 22:21, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
wrote:
> On Sun, Jan 15, 2012 at 10:15 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>> On 15 January 2012 22:11, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
>> wrote:
>> > On Sun, Jan 15, 2012 at 10:03 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> >>
>> >> This seems to work:
>> >>
>> >> def new
>> >>     @company = Company.find(params[:company_id])
>> >>     @manager = Manager.new
>> >>     @manager.managements.build
>> >>     new!
>> >>   end
>> >>
>> >>   def create
>> >>     @company = Company.find(params[:company_id])
>> >>     @manager = Manager.new(params[:manager])
>> >>    
@manager.managements.build(:role=>params[:role],:company =>
>> >> @company)
>> >>     create!
>> >>   end
>> >>
>> >> Am I correct now?
>> >
>> >
>> > Possibly, for company and manager.
>> >
>> > But the params you showed some time ago:
>> >
>> >
>> >  Parameters: {"utf8"=>"✓",
>> > "authenticity_token"=>"
>> > RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
>> > "manager"=>{"name"=>"q",
"surname"=>"",
>> > "fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
>> > "address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
>> > "commit"=>"Crea Amministratore",
"company_id"=>"6"}
>> >
>> > I did not see a
>> >
>> >   "role" => "Something"
>>
>> That''s because I didn''t have
@manager.managements.build in the controller.
>
>
> I doubt it ...
>
> What you get back in "params" when the "create" action
is called,
> is a function of the code and view that is rendered by the "new"
action.

In the new action I didn''t have @manager.managements.build so the form
couldn''t create the list of the roles to assign to management.role

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On Sun, Jan 15, 2012 at 10:25 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> On 15 January 2012 22:21, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
> wrote:
> > On Sun, Jan 15, 2012 at 10:15 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >>
> >> On 15 January 2012 22:11, Peter Vandenabeele
<peter-jNuWw7i2w7syMbTcgqFhxg@public.gmane.org>
> >> wrote:
> >> > On Sun, Jan 15, 2012 at 10:03 PM, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >> >>
> >> >> This seems to work:
> >> >>
> >> >> def new
> >> >>     @company = Company.find(params[:company_id])
> >> >>     @manager = Manager.new
> >> >>     @manager.managements.build
> >> >>     new!
> >> >>   end
> >> >>
> >> >>   def create
> >> >>     @company = Company.find(params[:company_id])
> >> >>     @manager = Manager.new(params[:manager])
> >> >>    
@manager.managements.build(:role=>params[:role],:company =>
> >> >> @company)
> >> >>     create!
> >> >>   end
> >> >>
> >> >> Am I correct now?
> >> >
> >> >
> >> > Possibly, for company and manager.
> >> >
> >> > But the params you showed some time ago:
> >> >
> >> >
> >> >  Parameters: {"utf8"=>"✓",
> >> > "authenticity_token"=>"
> >> > RpOtdQMIm6B45/e91h6ljXKpMCtRD//QJ+bP4knrcic=",
> >> > "manager"=>{"name"=>"q",
"surname"=>"",
> >> > "fiscal_code"=>"1121111111111111",
"city"=>"", "zip_code"=>"",
> >> > "address"=>"",
"street_number"=>"", "tel"=>"",
"email"=>""},
> >> > "commit"=>"Crea Amministratore",
"company_id"=>"6"}
> >> >
> >> > I did not see a
> >> >
> >> >   "role" => "Something"
> >>
> >> That''s because I didn''t have
@manager.managements.build in the
> controller.
> >
> >
> > I doubt it ...
> >
> > What you get back in "params" when the "create"
action is called,
> > is a function of the code and view that is rendered by the
"new" action.
>
>
> In the new action I didn''t have @manager.managements.build so the
form
> couldn''t create the list of the roles to assign to management.role
>
Ah I see now, the code you refer to is in the "new" action as well
(sorry,
I did not check careful enough). And of course, there it can have that
effect.

And sorry to the list for the large volume of posts about this case.

Peter

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> And sorry to the list for the large volume of posts about this case.
No no it''s my ignorance, you have helped me a lot, I''ve solved
a
problem that I had for months.
Really thanks a lot.

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Can I ask some help for another similar problem?
The first problem we have solved with your great help was:

class Company < ActiveRecord::Base
  has_many :managements
  has_many :managers, :through => :managements

class Manager < ActiveRecord::Base
  has_many :managements
  has_many :companies, :through => :managements

Management has an extra attribute :role and to assign a value to role
when we create a new company.manager we have set in the manager
controller:

def create
    @company = Company.find(params[:company_id])
    @manager = Manager.new(params[:manager])
    @manager.managements.build(:role => params[:manager][:role],
:company => @company)
    .....

It works!!.

Now I''ve extended Company model and it is.

class Company < ActiveRecord::Base
  has_many :categorizations
  has_many :categories, :through => :categorizations
  has_many :managements
  has_many :managers, :through => :managements

class Category < ActiveRecord::Base
  has_many :categorizations
  has_many :companies, :through => :categorizations

Categorization has two extra attributes, :classification_id and :amount.
Now I want to assign a value to classification_type when I create a new company.
In the controller I''ve done:

def create
    @company = Company.new(params[:company])
    @company.categorizations.build(:classification_id =>
params[:company][:classification])

but it creates two categorizations:

[#<Categorization id: 111, company_id: 106, category_id: nil,
classification_id: 2, amount: nil, created_at: "2012-01-16 20:12:18",
updated_at: "2012-01-16 20:12:18">, #<Categorization id: 112,
company_id: 106, category_id: 1, classification_id: nil, amount: nil,
created_at: "2012-01-16 20:12:18", updated_at: "2012-01-16
20:12:18">].





On 15 January 2012 22:46, Mauro
<mrsanna1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>> And sorry to the list for the large volume of posts about this case.
>
> No no it''s my ignorance, you have helped me a lot, I''ve
solved a
> problem that I had for months.
> Really thanks a lot.
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> Categorization has two extra attributes, :classification_id and :amount.
> Now I want to assign a value to classification_type when I create a new
company.
I mean classification_id and not classification_type.

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