Questions tagged [has-many-through]
1523 questions
7
votes
3 answers
rspec testing has_many :through and after_save
I have an (I think) relatively straightforward has_many :through relationship with a join table:
class User < ActiveRecord::Base
has_many :user_following_thing_relationships
has_many :things, :through =>…
dantswain
- 5,427
- 1
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- 37
7
votes
2 answers
Creating controllers and views for a has_many :through relationship in Rails 3
There are many tutorials that show you how to create the model instructions for a has_many :through relationship in Rails, but there doesn't seem to be many articles related to the process of setting up forms to create and edit these relationships.…
Randy Burgess
- 4,835
- 6
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- 59
7
votes
1 answer
Rails has_many :through with conditions and building associations
I'm having problems building an association that is a has_many :through with conditions. I have this model:
class Contact < AR
has_many :group_contacts
has_many :groups, :through => :group_contacts, :conditions => {:groups => {:published =>…
brad
- 31,987
- 28
- 102
- 155
7
votes
2 answers
Default_scope on a join table
I've got a model setup like the following:
class User
has_many :items
has_many :words, :through => :items
end
class Item
belongs_to :user
belongs_to :word
default_scope where(:active => true)
end
class Words
has_many :items
end
The…
joeellis
- 2,745
- 7
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- 45
7
votes
1 answer
has_many :through, :source, :source_type returning empty array
I got some Manager and SoccerTeam model. A manager "owns" many soccer teams; also a manager can comment on soccer teams and can comment on other managers too:
manager.rb
# Soccer teams the manager owns
has_many :soccer_teams, :dependent =>…
Alberto Santini
- 6,425
- 1
- 26
- 37
7
votes
1 answer
How to create a form for hasManyThrough relationship, with pivot, in a Laravel5 view
I am coming from a Rails background where we can create has_many_through pretty easily with the right references.
My models in this project: Deal <=> DealsFaqs <=> Faqs
In the Deals model I have:
public function faqs(){
return…
TJ Sherrill
- 2,465
- 7
- 50
- 88
7
votes
1 answer
Rails 4: combining has_many :through association with polymorphic association
In my Rails 4 app, I have the following models:
User
has_many :administrations
has_many :calendars, through: :administrations
has_many :comments
has_many :calendar_comments, through: :calendars, :source => :comments
Calendar
has_many…
Thibaud Clement
- 6,607
- 10
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- 103
7
votes
4 answers
How do I use accepts_nested_attributes_for?
Editing my question for conciseness and to update what I've done:
How do I model having multiple Addresses for a Company and assign a single Address to a Contact, and be able to assign them when creating or editing a Contact?
I want to use nested…
Satchel
- 16,414
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- 106
- 192
7
votes
2 answers
Many to Many Relationships with Ember, ember-data and Rails
I am having an issue with trying to save many to many relationships in Ember.js using ember-data and rails. The association works fine on the ember side of things, however when I try to commit the transaction it will not include the list of new…
McPants
- 83
- 1
- 6
7
votes
3 answers
Django: prefetch_related results ordered by a field of an intermediary table
How can I prefetch_related objects in Django and order them by a field in an intermediary table?
Here's the models I'm working with:
class Node(models.Model):
name = models.CharField(max_length=255)
edges = models.ManyToManyField('self',…
Ollie Glass
- 19,455
- 21
- 76
- 107
7
votes
4 answers
Self "HABTM" or "HasMany Through" concept confusion
Bounty:
+500 rep bounty to a GOOD solution. I've seriously banged my head against this wall for 2 weeks now, and am ready for help.
Tables/Models (simplified to show…
Dave
- 28,833
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- 113
- 183
6
votes
2 answers
ruby on rails after_remove, after_add callbacks on has_many :through
I have a model which fits the following pattern:
class foo < ActiveRecord::Base
has_many :bar, :dependent => :destroy
has_many :baz, :through => :bar, :uniq => true,
:after_add => :update_baz_count,
:after_remove => :update_baz_count
…
deruse
- 2,851
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6
votes
1 answer
Please explain the has_many, through: source: Rails Association
I've found a bunch of articles, stackoverflow answers and rails documentation about 'source:', but none of it explains this association in a way I can understand it. I need the most simplified explanation of this way of associating, if possible.
My…
sarah
- 151
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- 7
6
votes
1 answer
how to order of has_many through by a specific field
I have 3 models: member, team, and team_enrollment. The structure is as follows:
class Member < ApplicationRecord
has_many :team_enrollments
has_many :teams, -> {order 'team_enrollments.termination_date DESC NULLS LAST'}, through:…
Philip7899
- 4,599
- 4
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- 114
6
votes
2 answers
How do you get a list from complex active record has_many involved from a subset of downstream objects
I'm having a hard time getting a list of the games involved from a hierarchical parent relationship when multiple foreign keys are implemented on a relationship in the middle.
Given League Object NFC, find all of its Game objects [G1,G3,G4]
# id …
shadowbq
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