Is it possible to manage four models in a form?

The models are:

Company
has_many :categorizations
has_many :categories, :through => :categorizations

Category
has_many :categorizations
has_many :companies, :through => :categorizations

Classification
has_many :categorizations

Categorization
belongs_to :company
belongs_to :category
belongs_to :classification

I would create a new company, assign a category and assign a
classification to the company.category all with one form.
Is it possible?
I think the only way is to create a new company and assign a category
with one form, then in the company controller or company model assign
a classification at company.category, the classification.id may be
passed as a parameter with the form.
What do you think about?

On Mon, Dec 26, 2011 at 7:50 AM, Samir Selman
[email protected]wrote:

belongs_to :classification

Yes, it’s possible to use 4 models in a single form. But you have to
setup
the
naming of the inputs right coupled with accepts_nested_attributes_for.


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Try looking into nested forms

On 26 December 2011 03:14, Jim Ruther N. [email protected] wrote:

The models are:
has_many :categorizations
with one form, then in the company controller or company model assign
a classification at company.category, the classification.id may be
passed as a parameter with the form.
What do you think about?

Yes, it’s possible to use 4 models in a single form. But you have to setup
the
naming of the inputs right coupled with accepts_nested_attributes_for.

The problem is that I need to insert a value in the classification_id
of the join model Categorization.
The table for the join model is automatically enhanced, so when I
create a new Company in the categorizations table the attributes
company_id and category_id are setted.
I want to set also the attribute classification_id of the join table
so I think I can do it only in a before_save callback and not in the
company form.

On 26 December 2011 19:36, Bruno M. [email protected] wrote:

Hey,
Take a look at fields_for helper. This helper might help you.
:smiley:

Sorry for my ignorance, I’m trying but I don’t see the way fields_for
can help.

Hi Marco,
If I understand your question, Do you want to fill in one form many
models.
Am I right?
If your question is this you can use fields_for to apply it.
Check something similar in
http://railscasts.com/episodes/73-complex-forms-part-1

:smiley:

Sorry, I made a mistake…
Your name is Mauro and not Marco.
;/

Hey,
Take a look at fields_for helper. This helper might help you.
:smiley:

On 27 December 2011 02:45, Bruno M. [email protected] wrote:

Hi Marco,
If I understand your question, Do you want to fill in one form many models.
Am I right?

Yes but one of the models is the join model of a has_many :through
relation.
Company has_many :categories, :though => :categorizations
Classification has_many :categorizations
Categorization
belongs_to: company
belongs_to: category
belongs_to: classification

Categorizations attributes are:
company_id: integer
category_id: integer
classification_id: integer
amount: decimal

When I create a new Company with a category associated a join model
categorization is magically created with company_id and category_id
setted, ok?
I want be able, in the same form, setting also classification_id and
amount, so that, when the join model is created, it have company_id,
category_id, classification_id and amount all setted
Classification_id is taken from a collection:

= collection_select :categorization, :classification_id,
@classifications, :id, :classification_type

Is it possible to do that?

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