Rails - Mar 2010 - How to change a text field's contents to all uppercase letter

Hi,

I''m relatively new to RoR so pardon if this is a really stupid
question. I have a text field where people will be entering a
username. I need to figure out a way to either

1. validate the field so that it will not be accepted unless they''ve
entered all uppercase letters for their username -- less ideal
2. regardless of what they enter in the field (uppercase or lowercase)
I need to convert the username value to uppercase before it''s stored
in the database.

Here is my form:

<% form_for(@post) do |f| %>
  <%= f.error_messages %>

  <fieldset>
  <legend>Enter Details</legend>

  <div>
    <%= f.label :username,''Enter your username:'' %>
    <%= f.text_field :username, :size => 40 %>
  </div>

  <div>
    <%= f.submit "Save", :class => "submit" %>
  </div>

  </fieldset>

<% end %>


Thanks so much for any assistance! I greatly appreciate any help.

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>
> 2. regardless of what they enter in the field (uppercase or lowercase)
> I need to convert the username value to uppercase before it''s
stored
>
Try this:

class Post < ActiveRecord::Base
  def before_save
    self.username.downcase!
  end
end

Cheers,


Andy

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did you mean:

self.username.upcase ?? .... I need to make sure the username is
uppercase, not lowercase.

Thanks so much for the quick reply!


On Mar 5, 11:05 am, Andy Jeffries
<andyjeffr...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> > 2. regardless of what they enter in the field (uppercase or lowercase)
> > I need to convert the username value to uppercase before it''s
stored
>
> Try this:
>
> class Post < ActiveRecord::Base
>   def before_save
>     self.username.downcase!
>   end
> end
>
> Cheers,
>
> Andy
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On 5 March 2010 16:05, Andy Jeffries
<andyjeffries-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>> 2. regardless of what they enter in the field (uppercase or lowercase)
>> I need to convert the username value to uppercase before it''s
stored
>
>     self.username.downcase!
erm... upcase! ;-)

Or change the setter (rather than messing around with filters ;-)

def username=(value)
  write_attribute(:username, value.upcase)
end

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>
> >> 2. regardless of what they enter in the field (uppercase or
lowercase)
> >> I need to convert the username value to uppercase before
it''s stored
> >
> >     self.username.downcase!
>
> erm... upcase! ;-)
>
Doh :-)

> Or change the setter (rather than messing around with filters ;-)
>
> def username=(value)
>  write_attribute(:username, value.upcase)
> end
>
Is the setter called if you assign to the attributes hash (e.g. with new or
create)?

I guess it must be, but I''d generally put that in a callback to be sure
:-)

Cheers,


Andy

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I''d be putting this:

def username=(value)
  write_attribute(:username, value.upcase)
end

in my controller right?  Sorry for the beginning questions...


On Mar 5, 11:12 am, Michael Pavling
<pavl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On 5 March 2010 16:05, Andy Jeffries
<andyjeffr...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> >> 2. regardless of what they enter in the field (uppercase or
lowercase)
> >> I need to convert the username value to uppercase before
it''s stored
>
> >     self.username.downcase!
>
> erm... upcase! ;-)
>
> Or change the setter (rather than messing around with filters ;-)
>
> def username=(value)
>   write_attribute(:username, value.upcase)
> end
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On 5 March 2010 16:17, Andy Jeffries
<andyjeffries-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>> Or change the setter (rather than messing around with filters ;-)
>>
>> def username=(value)
>>  write_attribute(:username, value.upcase)
>> end
>
> Is the setter called if you assign to the attributes hash (e.g. with new or
> create)?
> I guess it must be, but I''d generally put that in a callback to be
sure :-)
> Cheers,
>
ooo.... good question - don''t know without testing it...
>> User.new(:username => "fred")
=> #<User id: nil, role_detail_id: nil, title: "FRED",
first_name:
nil, last_name: nil>

yup, looks that way.

But more to the point, I don''t like changing users'' input
before
storing it in the DB. We''ve shown how you *can* do it, and
you''ve said
you *need* to, but I''d wonder whether that''s really a *want*
to...
either way... it works either way.

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On 5 March 2010 16:24, xxdesmus
<xxdesmus-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I''d be putting this:
>
> def username=(value)
>  write_attribute(:username, value.upcase)
> end
>
> in my controller right?  Sorry for the beginning questions...
>
nope - in the User model.

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Worked perfectly...thanks so much!

Hey, you don''t happen to know of a simple way of implementing a date
picker for a field in a form do you? I was hoping to accomplish this
without needing to track down a plugin for the task.

On a related note: how can I set the default value of a field to be
today''s date (just the date, no time value)

Thanks for all the help!

On Mar 5, 11:25 am, Michael Pavling
<pavl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On 5 March 2010 16:24, xxdesmus
<xxdes...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > I''d be putting this:
>
> > def username=(value)
> >  write_attribute(:username, value.upcase)
> > end
>
> > in my controller right?  Sorry for the beginning questions...
>
> nope - in the User model.
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On 5 March 2010 16:38, xxdesmus
<xxdesmus-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hey, you don''t happen to know of a simple way of implementing a
date
> picker for a field in a form do you? I was hoping to accomplish this
> without needing to track down a plugin for the task.
I''ve used the "calendar_date_select" plugin in the past - it
is a
plugin, but it''s also very simple.
> On a related note: how can I set the default value of a field to be
> today''s date (just the date, no time value)
Again in the model (one of several ways to address the need) :

def after_initialize
  my_date_field = Date.today
end

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On 5 March 2010 16:43, Michael Pavling
<pavling-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Again in the model (one of several ways to address the need) :
>
> def after_initialize
>  my_date_field = Date.today
> end
>
Sorry - that''s bad - it will always reset the value to today even if
there is an existing value...

This will just set it if the "my_date_field" value is nil:

 my_date_field ||= Date.today

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When I add this to my model:

  def after_initialize
    :date = Date.today
  end

I get this error --  /home/xxdesmus/timetool/app/models/post.rb:38:
syntax error, unexpected ''='', expecting kEND :date =
Date.today ^

when I try it this way:

  def after_initialize
    date = Date.today
  end

It doesn''t do anything ...probably because my field should have a
different name other than "date" huh?

On Mar 5, 11:43 am, Michael Pavling
<pavl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On 5 March 2010 16:38, xxdesmus
<xxdes...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Hey, you don''t happen to know of a simple way of implementing
a date
> > picker for a field in a form do you? I was hoping to accomplish this
> > without needing to track down a plugin for the task.
>
> I''ve used the "calendar_date_select" plugin in the past
- it is a
> plugin, but it''s also very simple.
>
> > On a related note: how can I set the default value of a field to be
> > today''s date (just the date, no time value)
>
> Again in the model (one of several ways to address the need) :
>
> def after_initialize
>   my_date_field = Date.today
> end
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>
> When I add this to my model:
>
>  def after_initialize
>    :date = Date.today
>  end
>
> I get this error --  /home/xxdesmus/timetool/app/models/post.rb:38:
> syntax error, unexpected ''='', expecting kEND :date =
Date.today ^
>
You will do, you''re trying to assign a value to a symbol (which is an
immutable object).

> when I try it this way:
>
>  def after_initialize
>    date = Date.today
>  end
>
> It doesn''t do anything ...probably because my field should have a
> different name other than "date" huh?
>
 def after_initialize
   self.date = Date.today
 end

Doing:

date 
Will just assign the value to a local variable.

Cheers,


Andy

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On 5 March 2010 16:55, Andy Jeffries
<andyjeffries-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>  def after_initialize
>    self.date = Date.today
>  end
>
> Doing:
> date > Will just assign the value to a local variable.
+1
pesky local variables...

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On 5 March 2010 16:52, xxdesmus
<xxdesmus-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> When I add this to my model:
>
>  def after_initialize
>    :date = Date.today
>  end
As an aside, using "date" as a name for a db field might cause you
confusion down the line - it can be a reserved word (depending on the
db). I''d try to give the some more name context:
"registration_date"
or whatever.

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Got it working with:

  def after_initialize
    self.date ||= Date.today
  end

...hopefully I won''t be pressing my luck, but one last question (for
now). So I have a bunch of form fields that I need to add up their
values, and make sure their sum does not except the value entered in a
new form field. If the sum does exceed the form field value then I
want to alert the user and prevent it from saving. Basically I want to
validate that       :atWorkHours.value   >   ( :hoursMeetings.value
+ :hoursTraining.value + :hoursProjTrav.value )

I tried to do something similar to this in my model...but I assume I
just had the syntax completely wrong.

Last question/request for the day I promise!

Thanks,
Justin :)


On Mar 5, 11:55 am, Andy Jeffries
<andyjeffr...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> > When I add this to my model:
>
> >  def after_initialize
> >    :date = Date.today
> >  end
>
> > I get this error --  /home/xxdesmus/timetool/app/models/post.rb:38:
> > syntax error, unexpected ''='', expecting kEND :date =
Date.today ^
>
> You will do, you''re trying to assign a value to a symbol (which is
an
> immutable object).
>
> > when I try it this way:
>
> >  def after_initialize
> >    date = Date.today
> >  end
>
> > It doesn''t do anything ...probably because my field should
have a
> > different name other than "date" huh?
>
>  def after_initialize
>    self.date = Date.today
>  end
>
> Doing:
>
> date >
> Will just assign the value to a local variable.
>
> Cheers,
>
> Andy
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On 5 March 2010 17:02, xxdesmus
<xxdesmus-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> So I have a bunch of form fields that I need to add up their
> values, and make sure their sum does not except the value entered in a
> new form field. If the sum does exceed the form field value then I
> want to alert the user and prevent it from saving. Basically I want to
> validate that       :atWorkHours.value   >   ( :hoursMeetings.value
> + :hoursTraining.value + :hoursProjTrav.value )
>
> I tried to do something similar to this in my model...but I assume I
> just had the syntax completely wrong.
Assuming all of the "hours" attributes all return numbers (something,
somewhere is ensuring that, I hope ;-)  -- you can add some
validations to your model. Again, there''s a couple of ways of doing
this - I normally separate the method that adds the error to base from
the code that checks the condition (so I can check the condition
myself if I want), but you could easily merge them together if you
prefer:

  validate :validate_work_hours_not_exceeded

  def work_hours_exceeded?
    # this is a little different to your equation, as yours would
raise an error if both sides were exactly the same, and I''d guess
that''s not the right result - but if not, adjust it to suit
    [hours_at_meetings, hours_in_training, hours_travelling].sum >
hours_at_work
  end

  private
  def validate_work_hours_not_exceeded
    errors.add_to_base("Do not exceed working hours") if
work_hours_exceeded?
  end


I took the liberty of tweaking the variable names (although you were
showing them as symbols...) to make them a little more in line with
conventions (and, I think, more easily readable -  YMMV :-)

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Thank you so much for all your help!

On Mar 5, 2:44 pm, Michael Pavling
<pavl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On 5 March 2010 17:02, xxdesmus
<xxdes...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > So I have a bunch of form fields that I need to add up their
> > values, and make sure their sum does not except the value entered in a
> > new form field. If the sum does exceed the form field value then I
> > want to alert the user and prevent it from saving. Basically I want to
> > validate that       :atWorkHours.value   >   ( :hoursMeetings.value
> > + :hoursTraining.value + :hoursProjTrav.value )
>
> > I tried to do something similar to this in my model...but I assume I
> > just had the syntax completely wrong.
>
> Assuming all of the "hours" attributes all return numbers
(something,
> somewhere is ensuring that, I hope ;-)  -- you can add some
> validations to your model. Again, there''s a couple of ways of
doing
> this - I normally separate the method that adds the error to base from
> the code that checks the condition (so I can check the condition
> myself if I want), but you could easily merge them together if you
> prefer:
>
>   validate :validate_work_hours_not_exceeded
>
>   def work_hours_exceeded?
>     # this is a little different to your equation, as yours would
> raise an error if both sides were exactly the same, and I''d guess
> that''s not the right result - but if not, adjust it to suit
>     [hours_at_meetings, hours_in_training, hours_travelling].sum >
> hours_at_work
>   end
>
>   private
>   def validate_work_hours_not_exceeded
>     errors.add_to_base("Do not exceed working hours") if
work_hours_exceeded?
>   end
>
> I took the liberty of tweaking the variable names (although you were
> showing them as symbols...) to make them a little more in line with
> conventions (and, I think, more easily readable -  YMMV :-)
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Not having any luck with Calendar Date Select so far ... got it
installed, but it looks like the documentation is out of date @
http://www.railslodge.com/plugins/46-calendar-date-select  ...I can''t
for the life of me get the pop-up or embedded calendar to
display ...let alone get either to display in a form to take a value.


On Mar 7, 8:45 am, xxdesmus
<xxdes...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Thank you so much for all your help!
>
> On Mar 5, 2:44 pm, Michael Pavling
<pavl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
> > On 5 March 2010 17:02, xxdesmus
<xxdes...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > So I have a bunch of form fields that I need to add up their
> > > values, and make sure their sum does not except the value entered
in a
> > > new form field. If the sum does exceed the form field value then
I
> > > want to alert the user and prevent it from saving. Basically I
want to
> > > validate that       :atWorkHours.value   >   (
:hoursMeetings.value
> > > + :hoursTraining.value + :hoursProjTrav.value )
>
> > > I tried to do something similar to this in my model...but I
assume I
> > > just had the syntax completely wrong.
>
> > Assuming all of the "hours" attributes all return numbers
(something,
> > somewhere is ensuring that, I hope ;-)  -- you can add some
> > validations to your model. Again, there''s a couple of ways of
doing
> > this - I normally separate the method that adds the error to base from
> > the code that checks the condition (so I can check the condition
> > myself if I want), but you could easily merge them together if you
> > prefer:
>
> >   validate :validate_work_hours_not_exceeded
>
> >   def work_hours_exceeded?
> >     # this is a little different to your equation, as yours would
> > raise an error if both sides were exactly the same, and I''d
guess
> > that''s not the right result - but if not, adjust it to suit
> >     [hours_at_meetings, hours_in_training, hours_travelling].sum >
> > hours_at_work
> >   end
>
> >   private
> >   def validate_work_hours_not_exceeded
> >     errors.add_to_base("Do not exceed working hours") if
work_hours_exceeded?
> >   end
>
> > I took the liberty of tweaking the variable names (although you were
> > showing them as symbols...) to make them a little more in line with
> > conventions (and, I think, more easily readable -  YMMV :-)
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> Hey, you don''t happen to know of a simple way of implementing a
date
> picker for a field in a form do you? I was hoping to accomplish this
> without needing to track down a plugin for the task.
>
> On a related note: how can I set the default value of a field to be
> today''s date (just the date, no time value)
Did you try date_select?
<%=f.date_select :name_of_field %>
It defaults to today date if the field is of type date
It is not too fancy, but it works...

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I tried date_select but I kept getting a bunch of errors.

On Mar 7, 3:01 pm, Viorel
<viorelvl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> > Hey, you don''t happen to know of a simple way of implementing
a date
> > picker for a field in a form do you? I was hoping to accomplish this
> > without needing to track down a plugin for the task.
>
> > On a related note: how can I set the default value of a field to be
> > today''s date (just the date, no time value)
>
> Did you try date_select?
> <%=f.date_select :name_of_field %>
> It defaults to today date if the field is of type date
> It is not too fancy, but it works...
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On 7 March 2010 14:16, xxdesmus
<xxdesmus-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Not having any luck with Calendar Date Select so far ... got it
> installed, but it looks like the documentation is out of date @
> http://www.railslodge.com/plugins/46-calendar-date-select  ...I
can''t
> for the life of me get the pop-up or embedded calendar to
> display ...let alone get either to display in a form to take a value.
>
This is the location I''ve gotten it from in the past:
http://electronicholas.com/calendar

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What errors?

On Mar 8, 4:29 am, xxdesmus
<xxdes...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I tried date_select but I kept getting a bunch of errors.
>
> On Mar 7, 3:01 pm, Viorel
<viorelvl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
> > > Hey, you don''t happen to know of a simple way of
implementing a date
> > > picker for a field in a form do you? I was hoping to accomplish
this
> > > without needing to track down a plugin for the task.
>
> > > On a related note: how can I set the default value of a field to
be
> > > today''s date (just the date, no time value)
>
> > Did you try date_select?
> > <%=f.date_select :name_of_field %>
> > It defaults to today date if the field is of type date
> > It is not too fancy, but it works...
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