How to fix error Base table or view not found: 1146 Table laravel relationship table?

Question

I am a new of laravel I try to create relationship many to many between table,My problem when I am insert data in to database I got errors

QueryException in Connection.php line 713: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'learn.category_posts' doesn't exist (SQL: insert into category_posts (category_id, posts_id) values (4, ))

can anyone help me pls . and here below is my migrate and code:

2016_08_04_131009_create_table_posts.php

public function up()
{
    Schema::create('posts', function (Blueprint $table) {
        $table->increments('id');
        $table->text('title');
        $table->text('body');
        $table->timestamps();
    });
}

2016_08_04_131053_create_table_categories.php

public function up()
{
    Schema::create('categories', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name');
        $table->timestamps();
    });
}

2016_08_04_131413_create_table_category_posts.php

public function up()
{
    Schema::create('category_post', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('category_id')->unsigned();
        $table->integer('post_id')->unsigned();
        $table->foreign('category_id')->references('id')->on('categories')->onUpdate('cascade')->onDelete('cascade');
        $table->foreign('post_id')->references('id')->on('posts')->onUpdate('cascade')->onDelete('cascade');
        $table->timestamps();
    });
}

and my model Posts.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Posts extends Model
{
    protected $table = 'posts';

    public function categories()
    {
        return $this->belongsToMany('App\Category');
    }
}

Category.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
    protected $table = 'categories'; 

    public function posts()
    {
        return $this->belongsToMany('App\Posts');
    }   
}

My PostsController.php

public function create()
{
    $categories = Category::all();
    return view('create',compact('categories'));
}

public function store(Request $request)
{
   $post = new Posts;
   $post->title = $request->title;
   $post->body = $request->body;
   $post->categories()->attach($request->categories_id);

    return redirect()->route('posts.index');
}

My View create.blade.php

{!!Form::open(array('route' => 'store', 'method' => 'POST'))!!}

    {{Form::text('title')}}<br>
    {{Form::textarea('body')}}<br>
    <select name="categories_id" multiple>
        @foreach ($categories as $category)
            <option value="{{ $category->id }}">{{ $category->name }}</option>
        @endforeach
    </select>
    <br>
    {{Form::submit('submit')}}

{!!Form::close()!!}

Answer 1

It seems Laravel is trying to use category_posts table (because of many-to-many relationship). But you don't have this table, because you've created category_post table. Change name of the table to category_posts.

Answer 2

Laravel tries to guess the name of the table, you have to specify it directly so that it does not give you that error..

Try this:

class NameModel extends Model {
    public $table = 'name_exact_of_the_table';

I hope that helps!

Answer 3

Schema::table is to modify an existing table, use Schema::create to create new.

Answer 4

The main problem for causing your table unable to migrate, is that you have running query on your "AppServiceProvider.php" try to check your serviceprovider and disable code for the meantime, and run php artisan migrate

Answer 5

You can add this in Post Model,

public function categories()
{
 return $this->belongsToMany('App\Category','category_post','post_id','category_id');                 
}

category_post indicate the table you want to use.
post_id indicate the column where you want to store the posts id.
category_id indicate the column where you want to store the categories id.

Answer 6

For solving your Base Table or view not found error you can do As @Alexey Mezenin said that change table name category_post to category_posts,

but if you don't want to change the name like in my case i am using inventory table so i don't want to suffix it by s so i will provide table name in model as protected $table = 'Table_name_as_you_want' and then there is no need to change table name:

Change your Model of the module in which you are getting error for example:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Inventory extends Model
{
    protected $table = 'inventory';

    protected $fillable = [
        'supply', 'order',
    ];
}

you have to provide table name in model then it will not give error.

Answer 7

The simplest thing to do is, change the default table name assigned for the model. Simply put following code, protected $table = 'category_posts'; instead of protected $table = 'posts'; then it'll do the trick.

However, if you refer Laravel documentation you'll find the answer. Here what it says,

By convention, the "snake case", plural name of the class(model) will be used as the table name unless another name is explicitly specified

Better to you use artisan command to make model and the migration file at the same time, use the following command,

php artisan make:model Test --migration

This will create a model class and a migration class in your Laravel project. Let's say it created following files,

Test.php

2018_06_22_142912_create_tests_table.php

If you look at the code in those two files you'll see,

2018_06_22_142912_create_tests_table.php files' up function,

 public function up()
 {
      Schema::create('tests', function (Blueprint $table) {
      $table->increments('id');
      $table->timestamps();
      });
 }

Here it automatically generated code with the table name of 'tests' which is the plural name of that class which is in Test.php file.