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Neil Middleton

2009-Apr-01 09:04 UTC

Sub controllers?

I''m pretty new to Rails and have an issue which I can''t quite
get my
head around as to the architecturally ''correct'' way of doing
it.

Problem relates to what I kinda call sub-controllers. The scenario is
this:

I have a series of pages, on which is a panel of some form containing
some information (think the user panel on gitHub top right).

So, in my app, I have controllers that generate the data for the pages
and render out the responses which is fine, but when it comes to this
panel, it seems to me that you would want some sort of controller action
dedicated to generating this panel and it''s view.

Question is, how do you go about doing this?  How do I render a ''sub
controller'' from within a view?
-- 
Posted via http://www.ruby-forum.com/.

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John Yerhot

2009-Apr-01 17:01 UTC

head link

Re: Sub controllers?

Hey Neil,

Well, I''d go about it with a partial for the actual view part.  If you
simply need to just display it on a couple of actions, use a
before_filter to call a method that sets variables only on those
actions which require the submenu... then in your layout or view check
that the variable is set and render the partial.

Otherwise, if you have a authentication system, set the variables in
there.  restful_authentication does this by providing logged_in? and
current_user for you.

Hope that makes sense.  :)

John


On Apr 1, 4:04 am, Neil Middleton
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> I''m pretty new to Rails and have an issue which I can''t
quite get my
> head around as to the architecturally ''correct'' way of
doing it.
>
> Problem relates to what I kinda call sub-controllers. The scenario is
> this:
>
> I have a series of pages, on which is a panel of some form containing
> some information (think the user panel on gitHub top right).
>
> So, in my app, I have controllers that generate the data for the pages
> and render out the responses which is fine, but when it comes to this
> panel, it seems to me that you would want some sort of controller action
> dedicated to generating this panel and it''s view.
>
> Question is, how do you go about doing this?  How do I render a
''sub
> controller'' from within a view?
> --
> Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~
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Neil Middleton

2009-Apr-02 00:38 UTC

head link

Re: Sub controllers?

it does partly - although I''m thinking more generically. For instance,
let''s
take the navigation for an app where it''s state is dependant on some
data in
the DB.  I don''t really want my page action to have to know anything
about
the nav at all, as that''s the layouts job to know what''s on
the page, but I
require a controller to provide the navigation with data.
From what I understand of partials these are kinda headless in that they
render a given variable, but don''t have any interaction with the
controller
per se.

How do I go about rendering in this way? How do I let the layout kick of
code to render chunks of a page that contain data without contaminating my
page actions?

Neil

On Wed, Apr 1, 2009 at 6:01 PM, John Yerhot
<joyerhot-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> Hey Neil,
>
> Well, I''d go about it with a partial for the actual view part.  If
you
> simply need to just display it on a couple of actions, use a
> before_filter to call a method that sets variables only on those
> actions which require the submenu... then in your layout or view check
> that the variable is set and render the partial.
>
> Otherwise, if you have a authentication system, set the variables in
> there.  restful_authentication does this by providing logged_in? and
> current_user for you.
>
> Hope that makes sense.  :)
>
> John
>
>
> On Apr 1, 4:04 am, Neil Middleton
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
> > I''m pretty new to Rails and have an issue which I
can''t quite get my
> > head around as to the architecturally ''correct'' way
of doing it.
> >
> > Problem relates to what I kinda call sub-controllers. The scenario is
> > this:
> >
> > I have a series of pages, on which is a panel of some form containing
> > some information (think the user panel on gitHub top right).
> >
> > So, in my app, I have controllers that generate the data for the pages
> > and render out the responses which is fine, but when it comes to this
> > panel, it seems to me that you would want some sort of controller
action
> > dedicated to generating this panel and it''s view.
> >
> > Question is, how do you go about doing this?  How do I render a
''sub
> > controller'' from within a view?
> > --
> > Posted viahttp://www.ruby-forum.com/.
> >
>

-- 
Neil Middleton

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Andrew Bloom

2009-Apr-02 05:03 UTC

head link

Re: Sub controllers?

You can use some inheritance and before_filters to handle this.

class ApplicationController < ActionController::Base
    def load_panel_data
        @data = Data.all
    end
end

class OtherController < ActionController::Base
    before_filter :load_panel_data

    ... your normal actions ...
end

In your layout you can now render a partial that is expecting the
@data variable. before_filters are inheritable and configurable.
http://api.rubyonrails.org/classes/ActionController/Filters/ClassMethods.html

On Apr 1, 7:38 pm, Neil Middleton
<neil.middle...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> it does partly - although I''m thinking more generically. For
instance, let''s
> take the navigation for an app where it''s state is dependant on
some data in
> the DB.  I don''t really want my page action to have to know
anything about
> the nav at all, as that''s the layouts job to know what''s
on the page, but I
> require a controller to provide the navigation with data.
> From what I understand of partials these are kinda headless in that they
> render a given variable, but don''t have any interaction with the
controller
> per se.
>
> How do I go about rendering in this way? How do I let the layout kick of
> code to render chunks of a page that contain data without contaminating my
> page actions?
>
> Neil
>
>
>
>
>
> On Wed, Apr 1, 2009 at 6:01 PM, John Yerhot
<joyer...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Hey Neil,
>
> > Well, I''d go about it with a partial for the actual view
part.  If you
> > simply need to just display it on a couple of actions, use a
> > before_filter to call a method that sets variables only on those
> > actions which require the submenu... then in your layout or view check
> > that the variable is set and render the partial.
>
> > Otherwise, if you have a authentication system, set the variables in
> > there.  restful_authentication does this by providing logged_in? and
> > current_user for you.
>
> > Hope that makes sense.  :)
>
> > John
>
> > On Apr 1, 4:04 am, Neil Middleton
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> > wrote:
> > > I''m pretty new to Rails and have an issue which I
can''t quite get my
> > > head around as to the architecturally ''correct''
way of doing it.
>
> > > Problem relates to what I kinda call sub-controllers. The
scenario is
> > > this:
>
> > > I have a series of pages, on which is a panel of some form
containing
> > > some information (think the user panel on gitHub top right).
>
> > > So, in my app, I have controllers that generate the data for the
pages
> > > and render out the responses which is fine, but when it comes to
this
> > > panel, it seems to me that you would want some sort of controller
action
> > > dedicated to generating this panel and it''s view.
>
> > > Question is, how do you go about doing this?  How do I render a
''sub
> > > controller'' from within a view?
> > > --
> > > Posted viahttp://www.ruby-forum.com/.
>
> --
> Neil Middleton--~--~---------~--~----~------------~-------~--~----~
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Rails - Apr 2009 - Sub controllers?

Sub controllers?

Re: Sub controllers?

Re: Sub controllers?

Re: Sub controllers?