[Laravel5.1-0.0.6] Seeder automatically fills in test data

[Laravel5.1-0.0.6] Seeder automatically fills in test data

Book: http://www.jianshu.com/users/85c8826ce087/latest_articles

1. what is Seeder?

• Is a data filler tool;

• Laravel comes with the database/seeds/DatabaseSeeder. php class;

• The file is generated under database/seeds/By Command;

2. what is Seeder used?

• Automatically generate batch test data;

• After table migration, a series of data can be automatically imported for collaborative development;

3. original Seeder code

 call(UserTableSeeder::class);           Model::reguard();        }}

• The DatabaseSeeder class contains only the run method, which is called when the data generation command is run;

• The three database operation methods can be used in the run () method.

• No return value

4. use Seeder 4.1 Basic use

• Fill in the content in database/seeds/DatabaseSeeder. php to fill in the data;

• The content added in the run () method will be filled with the data content in the articles table (using SQL statements ):

    public function run()    {       DB::insert('insert into                    articles(title, content,created_at,updated_at)                            values (?, ?,?,?)',                      ['article-title2','article-content2',                  \Carbon\Carbon::now(),\Carbon\Carbon::now()]                  );    }

• Run the php artisan db: seed command in the directory. If no prompt is displayed, go to the database table and check that a record is generated;

• To generate multiple records at the same time, you can add multiple statements and then run the same command.
  Php artisan db: seed;

• A simple time package: Carbon is recommended;

4.2 generate the filler separately and use

• Create a new filling class:

php artisan make:seeder ArticleTableSeeder

• Cut the insert statement previously written in the database/seeds/DatabaseSeeder class into the run () method of the database/seeds/ArticleTableSeeder class;

• In the DatabaseSeeder class run () method, use the call method to obtain the padding class to run:

public function run(){    $this->call(ArticleTableSeeder::class);}

• In this way, the data to be filled in each table can be used separately, which is really good;

• Run the filler:
  

4.3 run the filler

• Command:

php artisan db:seed

• To run a single filler, add -- class = ArticleTableSeeder.

php artisan db:seed --class=ArticleTableSeeder

• Roll back and run data migration again

php artisan migrate:refresh --seed

4.4 faster batch production data Model factory

• The model factory is worth further details:
  Http://laravelacademy.org/post/238.html#model-factories

Learning Laravel school notes: http://laravelacademy.org/post/133.html