How to create pivot table in laravel using migration

• Create pivot table using foreignId() method in Laravel 7, 8

  --PATH database\migrations\<yourmigrationfile>.php

  //Migration command to create migration file
  php artisan make:migration create_project_user_table --create=project_user
  
  //Migration file code under - database\migrations\<yourmigrationfile>.php
  public function up(){
      Schema::create('project_user', function (Blueprint $table) {
          $table->foreignId('project_id')->constrained();
          $table->foreignId('user_id')->constrained();
      });
  }
  

  Laravel migrations helps to create a Pivot table with proper columns and foreign key relations to both the users and projects table. Basically the pivot table is the intermediate table between two tables which are connected with relationships using the Many to Many relationship method. The column with the constrained method, in the child table (pivot table) will always reference to the id column of the parent table.

  You have to run - php artisan make:migration create_project_user_table --create --table=project_user to create the pivot table migration file after that you can copy/paste code in this migration file and run migrate command to create pivot table in your database.

  Pivot table names are listed in alphabetical order and should be singular like (project_user). If you want to create a model for the pivot table then extends Pivot instead of model. 

• Create pivot table with foreignId() method in Laravel 7,8 with timestamps

  --PATH database\migrations\<yourmigrationfile>.php

  //Migration command to create migration file
  php artisan make:migration create_project_user_table --create=project_user
  
  //Migration file code under - database\migrations\<yourmigrationfile>.php
  public function up(){
      Schema::create('project_user', function (Blueprint $table) {
          $table->foreignId('project_id')->constrained();
          $table->foreignId('user_id')->constrained();
          $table->timestamps();
      });
  }
  

  You can add created_at and updated_at columns in the table using $table->timestamps(); in your migration file. 

• Create pivot table in laravel with multiple columns

  --PATH database\migrations\<yourmigrationfile>.php

  //Migration command to create migration file
  php artisan make:migration create_project_user_table --create=project_user
  
  //Migration file code under - database\migrations\<yourmigrationfile>.php
  public function up(){
      Schema::create('project_user', function (Blueprint $table) {
          $table->foreignId('project_id')->constrained();
          $table->foreignId('user_id')->constrained();
          $table->boolean('is_manager')->default(false);
          $table->timestamps();
      });
  }
  

  You can add multiple columns in the laravel pivot table using migration. This code snippet adds is_manager columns in the pivot table with default value false and adds created_at and updated_at fields using timestamps method.

• Pivot table with unsigned() , index() , primary() and onDelete(‘cascade’) method

  --PATH database\migrations\<yourmigrationfile>.php

  //Migration command to create migration file
  php artisan make:migration create_role_user_table --create=role_user
  
  //Migration file code under - database\migrations\<yourmigrationfile>.php
  public function up()
  {
      Schema::create('role_user', function (Blueprint $table) {
          $table->integer('user_id')->unsigned()->index();
          $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
          $table->integer('role_id')->unsigned()->index();
          $table->foreign('role_id')->references('id')->on('roles')->onDelete('cascade');
          $table->primary(['user_id', 'role_id']);
      });
  }
  

  This code snippet add the foreign key user_id and role_id in table with onDelete('cascade') method which automatically deletes the related child table record (pivot table record) on delete the parent table record(users table , roles table). LIke if you delete the user with id 1 then it will delete all the records from pivot table (role_user) where user_id is 1. The migration will also set both role_id and user_id columns as the primary keys so there cannot be duplicates with both the same user_id and role_id.

• How do I access pivot tables in Laravel?

  On the relationships for both User and Target , tack on a ->withPivot('type') which will instruct Laravel to include that column. Then once you have your result set, you can access the field with $user->pivot->type .

• How do you make a many to many relationship in laravel?

  Here we will learn in Laravel many to many relationship. Step 1: Install Laravel. Step 2: Create a model and migration. Step 3: Define random categories manually. Step 4: Define a Pivot table. Step 5: Define Many To Many relationships. Step 6: Create a Product.

• How can we create table in Laravel using migrate?

  php artisan make:migration create_posts_table. php artisan migrate. php artisan make:migration create_posts_table --table=posts. php artisan migrate --path=/database/migrations/2020_04_01_064006_create_posts_table.php. php artisan migrate:rollback.

• How do I update a pivot table in Laravel 8?

  There are many ways to update the pivot table in Laravel. We can use attach(), detach(), sync(), and pivot attribute to update the intermediate table in Laravel.

• How do you name pivot table in Laravel?

  Laravel's naming convention for pivot tables is snake_cased model names in alphabetical order separated by an underscore. So, if one model is Feature , and the other model is Product , the pivot table will be feature_product

• What is migration table in Laravel?

  Migrations are like version control for your database, allowing your team to modify and share the application's database schema. Migrations are typically paired with Laravel's schema builder to build your application's database schema.

• How do I get pivot table data in Laravel?

  We have to follow below code to get pivot table data in Laravel. // In model User.php, add withPivot; for ex :

  public function customer(){
  	return $this->belongsToMany('role')->withPivot('type'); 
  	// 'type' is from pivot table user_role.
  }
  

  // then access the field with ->pivot; for ex:

  $current_user->customer->pivot->type.

• How to create pivot table using migration?

  A typical pivot table does not require a Model; you only need a migration, you can run migration command php artisan make:migration create_role_user_table to create a migration file for pivot table. Now you can run php artisan migrate command to create pivot table.

• Do pivot tables need ID?

  Normaly a pivot table does not have /not need an id nor does it normally have foreign keys defined. The primary key is usually defined as a combination of the two related table ids.

• What is the proper way to create the pivot table in Laravel?

  The migration should look like this, it establishes the proper columns and foreign key relations to both the users and roles table. The migration will also set both user_id and role_id as the primary keys so there cannot be duplicates with both the same user_id and role_id.

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