has-and-belongs-to-many

问题 I have this relationship in my Model: public function modulesData($module) { return $this->belongsToMany($module) ->withTimestamps(); } What I want is to eagerload a dynamic relation of my model. But how can I do this? I use this code to eagerload my relation, but how can I add the parameter $module ? $model->with(['modulesData'])->get(); Thanks for reply. 回答1: Consider the following: Define the fallback function to your Model: public function __call($name, $arguments) { if (strpos($name,

问题 I have a belongsToMany relationship between two tables which is configured using a through table. class UsersTable extends Table { public function initialize(array $config) { $this->belongsToMany('Groups', [ 'through' => 'GroupsUsers', ]); } } class GroupsTable extends Table { public function initialize(array $config) { $this->belongsToMany('Users', [ 'through' => 'GroupsUsers', ]); } } class GroupsUsersTable extends Table { public function initialize(array $config) { $this->belongsTo('Groups

问题 I have a belongsToMany relationship between two tables which is configured using a through table. class UsersTable extends Table { public function initialize(array $config) { $this->belongsToMany('Groups', [ 'through' => 'GroupsUsers', ]); } } class GroupsTable extends Table { public function initialize(array $config) { $this->belongsToMany('Users', [ 'through' => 'GroupsUsers', ]); } } class GroupsUsersTable extends Table { public function initialize(array $config) { $this->belongsTo('Groups

来源： https://stackoverflow.com/questions/64805530/cakephp-4-linking-2-existing-entities-with-belongstomany-association

问题 I have the following setup. 1 product has many product_types. many product_types have 1 type. A HABTM relationship from my understanding of the docs. My models are class Product < ApplicationRecord has_and_belongs_to_many :types end class Type < ApplicationRecord has_and_belongs_to_many :products end I have a join table migration as such class CreateJoinTableProductTypes < ActiveRecord::Migration[5.1] def change create_join_table :products, :types do |t| t.index :product_id t.index :type_id

问题 How define a has_and_belongs_to_many polymorphic association? Situation: Figure that we have users, tracks, lists, etc... and all these models can be tagged and use this tag for filter. What i'm trying to do is: Use has_and_belongs_to_many that enable to a tag to have other objects, and that other objects also can have other tags. So for enable a tag that belongs to more than one kind of object (users or tracks or tracklists), we need to use polymorphic relations. That's my code on this

问题 There are three tables in the database: users (not empty) schedules (not empty) schedules_users ( empty ) user-model: class User < ActiveRecord::Base [...] has_and_belongs_to_many :schedules#has_many :schedules [...] end schedule-model: class Schedule < ActiveRecord::Base has_and_belongs_to_many :users#belongs_to :user end welcome-controller: (where I want to sort the schedules by date and time) class WelcomeController < ApplicationController def index if(current_user) @user_schedules =

问题 I'm migrating an application from Cake 1.3 to 3.0. My database has teams and people (with teams_people to connect them via belongsToMany relations) and divisions (teams belongTo divisions). The teams_people table has additional information, like whether the person's role on the team (captain, player), jersey number, position, that sort of thing. In the example below, I'm trying to read the list of teams in open divisions that a person is on, including their position, etc. $teams = $this-

问题 I'm migrating an application from Cake 1.3 to 3.0. My database has teams and people (with teams_people to connect them via belongsToMany relations) and divisions (teams belongTo divisions). The teams_people table has additional information, like whether the person's role on the team (captain, player), jersey number, position, that sort of thing. In the example below, I'm trying to read the list of teams in open divisions that a person is on, including their position, etc. $teams = $this-

问题 Today I've been working on a HABTM association between my Plugins and Categories. I got it almost working, but run into trouble with the collection_select . I have a select in my form and I succesfully call all the existing Categories, but when I submit the form, a new Category is created. For example I select the category Synthesizer. When I submit, I suddenly have two categories called Synthesizer. How can I make it so that the Plugin is associated with the Category, but does not create a