Adding records to a nested model through an association

[John Sanderbeck]

Not sure if the subject is correct for what I am trying to do...

I am working on a School application and I added an Attendance section

There is an attendance record that is associated to a student record

The student record has an associated model called notes...

What I would like to be able to do is add notes to the student through the attendance record...

My Attendance record belongs_to :student

My Student record has_many :attendances

My Student record has_many :notes

I can access Attendance.student.notes just fine, but when I try to add notes through a nested form it doesn't like that...

Also just tried adding has_many :notes, through: :student and now I can access Attendance.notes, however when I add

      <%= f.fields_for :notes %>

      <%= f.link_to_add "Add Note", :notes, class: 'btn btn-xs btn-primary btn-padded' %>

I get an error no block given(yield)

Any suggestions on how to code the nested form?   Is this a routes issue?

John

[Walter Lee Davis]

> On Aug 14, 2018, at 5:49 PM, John Sanderbeck <band...@gmail.com> wrote:
>
> Not sure if the subject is correct for what I am trying to do...
>
> I am working on a School application and I added an Attendance section
>
> There is an attendance record that is associated to a student record
>
> The student record has an associated model called notes...
>
> What I would like to be able to do is add notes to the student through the attendance record...
>
> My Attendance record belongs_to :student
> My Student record has_many :attendances
> My Student record has_many :notes
>
> I can access Attendance.student.notes just fine, but when I try to add notes through a nested form it doesn't like that...
>
> Also just tried adding has_many :notes, through: :student and now I can access Attendance.notes, however when I add
>
> <%= f.fields_for :notes %>

You need to add a 'do' at the end of the previous line. Without that, and...

> <%= f.link_to_add "Add Note", :notes, class: 'btn btn-xs btn-primary btn-padded' %>

an end here to close the block, you're not giving a black to the fields_for macro. That's what the error means.

Walter

>
> I get an error no block given(yield)
>
> Any suggestions on how to code the nested form? Is this a routes issue?
>
> John
>

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[John Sanderbeck]

That's the way all my other nests are defined and they work fine...  I think the problem is I am adding a nest from a different model than I am actually working on...

[John Sanderbeck]

The way the nests are working now is it should render the file _note_fields.html.erb but it acts like it is not finding that file which tells me the fields_for is looking for a different name due to the way it is nested

[John Sanderbeck]

I figured it out...   Didn't have a accepts_nested_attributes_for :notes in my attendance model...  Duh !!!

However when I try to write I get an error 

Cannot modify association 'Attendance#notes' because the source reflection class 'Note' is associated to 'Student' via :has_many.

[John Sanderbeck]

Is this the proper relationship for this to work?   It looks right to me...

What I want to do is add notes to a student through the Attendance Edit form

class Attendance < ActiveRecord::Base

        belongs_to :student

        accepts_nested_attributes_for :student

        has_many :notes, through: :student

        accepts_nested_attributes_for :notes

end

class Student < ActiveRecord::Base

        # Also used through Attendance Edit

        has_many :attendances, dependent: :destroy

        has_many :notes, dependent: :destroy

        accepts_nested_attributes_for :notes, allow_destroy: true

end

class Note < ActiveRecord::Base

        belongs_to :student

end