I have a Rails API that communicates with an Ember app. I need to be able to serialize a model that has two primary keys instead of the default id.
This is what it looks like right now:
Models
# This is the problem model:
class Value < ActiveRecord::Base
self.primary_keys = :foreign_id, :type_id
belongs_to :type, foreign_key: :type_id
end
class Type < ActiveRecord::Base
has_many :codes, foreign_key: :code_type_id
has_many :values, foreign_key: :type_id
end
class Code < ActiveRecord::Base
belongs_to :type, foreign_key: :code_type_id
end
class Activity < ActiveRecord::Base
has_many :values, -> (object){ where("type_subject_area = ?", "Activity") }, foreign_key: :foreign_id
end
Schema
create_table "values", id: false, force: :cascade do |t|
t.integer "foreign_id"
t.string "type_subject_area"
t.integer "code_id"
t.integer "type_id"
t.string "type_title"
t.text "text"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "values", ["foreign_id", "type_id"], name: "index_values_on_foreign_id_and_type_id", unique: true, using: :btree
create_table "types", force: :cascade do |t|
t.integer "id"
t.string "title"
t.string "subject_area"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "types", ["id"], name: "index_types_on_id", unique: true, using: :btree
create_table "activities", force: :cascade do |t|
t.integer "id"
t.datetime "created_at"
t.string "name"
end
add_index "activities", ["activity_type"], name: "index_activities_on_activity_type", using: :btree
add_index "activities", ["id"], name: "index_activities_on_id", unique: true, using: :btree
create_table "codes", force: :cascade do |t|
t.integer "id"
t.string "description"
t.string "code_value"
t.integer "code_type_id"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "codes", ["id"], name: "index_codes_on_id", unique: true, using: :btree
Serializers
class ActivitySerializer < ActiveModel::Serializer
attributes :id, :name
has_many :values
end
class UDFValuesSerializer < ActiveModel::Serializer
attributes :foreign_id, :type_subject_area, :type_id, :text, :type_title
end
As you can see, a type has many values and codes. An activity has many values, though it's only related to the values that have a subject area of "Activity". Since values don't have an individual primary key, I'm not sure how to format it in such a way that works in Ember. From what I understand, Ember needs to have an id available in order to receive the values.
Thoughts? Ideas? I'm afraid this needs to be in this format because the Rails API is communicating and syncing with another, larger API.
