Laravel Vuejs combat: know almost Development (17) achieved submit answers

1. Add the routing and processing logic AnswerController:

form 2. Answer in the question submitted details Add Page

3. Since the submission within give the Question and User model assignment answer_id so $ fillable property in plus 'answer_id':

In dealing with many of

Php Laravel framework of multi-table Eloquent handle the relationship between treatment-many relationship

Laravel One to Many Eloquent Relationship Tutorial

Many-time:

Laravel in the Pivot Table-many relationship

To-many relationship, when creating the model answer, and the question needs to be updated user inside answer_id,

However, before the migration Riga forget foreign key;

[Between model through the model associated with the default configuration approach has been to explain the foreign key: many ]

laravel model table to establish a foreign key constraint use:

model:

  1 // Table -> Posts
   2 class the extends the Model Post
   . 3 {
   . 4      // associated with the user:
   . 5      public function User () {
   . 6          // a belongsTo, the first parameter: foreign key table, a second: the current foreign key table third: an outer tapered table's primary key.
  7          // If the second is a noun + id, and the third is: id. The last two parameters can be omitted:
   . 8          // return $ this-> a belongsTo ( 'the App \ the User');
   . 9          return $ this-> a belongsTo ( 'the App \ the User', 'user_id', 'ID');
 10      }
 11 }
 12 

Call view: the following outputs: Posts user_id id table name corresponding to the value of the user table

  1 <a href="#">{{$post->user->name}}</a></p>

Now add, execute the command:

  1 php artisan make:migration add_foreign_key_relationship_to_answers_table --table=answers

Note that answers the table;

  1 <?php
  2 
  3 use Illuminate\Database\Migrations\Migration;
  4 use Illuminate\Database\Schema\Blueprint;
  5 use Illuminate\Support\Facades\Schema;
  6 
  7 class AddForeignKeyRelationshipToAnswersTable extends Migration
  8 {
  9     /**
 10      * Run the migrations.
 11      *
 12      * @return void
 13      */
 14     public function up()
 15     {
 16         Schema::table('answers', function (Blueprint $table) {
 17             //
 18             $table->foreign('user_id')->references('id')->on('users');
 19             $table->foreign('question_id')->references('id')->on('questions');
 20         });
 21     }
 22 
 23     /**
 24      * Reverse the migrations.
 25      *
 26      * @return void
 27      */
 28     public function down()
 29     {
 30         Schema::table('answers', function (Blueprint $table) {
 31             //
 32             $table->dropForeign('answers_user_id_foreign');
 33             $table->dropForeign('answers_question_id_foreign');
 34         });
 35     }
 36 }
 37 
 38 

2020_02_29_143522_add_foreign_key_relationship_to_answers_table.php

Note that foreign key name: answers_user_id_foreign review: Foreign Key the Constraints 

Then execute:

  1 php artisan migrate