How do I create a new entry for a many-to-many association that accepts nested attributes?
Organization
and User
have a many-to-many relationship through Relationship
. I originally implemented this 1-to-many association, which worked, but now I need it to become a many-to-many association. So I created a model Relationship
and changed the association in the model files.
Organization
accepts nested attributes for User
like in my application. I have a combined registration form for the two. Also, I use it in the seed file:
Organization.create!(name: "name", ...).users.create(email: "email@email.com", ...)
This worked when it was a one-to-many association, but now it is a many-to-many association that occurs when seeding an error:
Validation failed: Member can't be blank, Moderator can't be blank
This applies to variables for the model Relationship
through which User
and are bound Organization
.
What is causing this error; why are these values ββempty? Is it possible that the string Organization.create
is incorrect for a many-to-many association? member
and moderator
have default values ββ(see migration file). I expect it to create values Organization
, User
and Relationship
with default values. How else should I create a new organization and user?
Organization model:
has_many :relationships, dependent: :destroy
has_many :users, through: :relationships
accepts_nested_attributes_for :relationships, :reject_if => :all_blank, :allow_destroy => true
validates_associated :users
Relationship model:
belongs_to :organization
belongs_to :user
accepts_nested_attributes_for :user
validates_presence_of :organization
validates_presence_of :user
validates :member, presence: true
validates :moderator, presence: true
User Model:
has_many :relationships, dependent: :destroy
has_many :organizations, through: :relationships, inverse_of: :users
Moving relationships:
class CreateRelationships < ActiveRecord::Migration
def change
create_table :relationships do |t|
t.belongs_to :user, index: true
t.belongs_to :organization, index: true
t.boolean :member, null: false, default: false
t.boolean :moderator, null: false, default: false
t.timestamps null: false
end
add_index :relationships, [:user_id, :organization_id], unique: true
end
end
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I think your problem might be that you did not specify a "foreign key" for the has_many relationship in the User Model. Try:
has_many :relationships, foreign_key: "organization_id", dependent: :destroy
This uniquely identifies the organization for its relationship with your user model.
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