Add indexes for system file table

[Kulbij]

Work has been done to add indexes for the system_files table.
As a result, we get an increase in the speed of queries to the system_fiels table.
Testing was carried out on high-load projects with a large number of images > 1 million for different models (for example: Products, Articles, etc.).

After adding indexes for the system_files table, the speed of the project (queries to the database) increased several times.

[daftspunk]

Hi @Kulbij

Thanks for this. Can you confirm that the following schema has the necessary indexes for performance? If not, could you please modify it based on your findings?

Schema::create('system_files', function (Blueprint $table) {
    $table->increments('id');
    $table->string('disk_name');
    $table->string('file_name');
    $table->integer('file_size');
    $table->string('content_type');
    $table->string('title')->nullable();
    $table->text('description')->nullable();
    $table->string('field')->nullable();
    $table->integer('attachment_id')->nullable();
    $table->string('attachment_type')->nullable();
    $table->boolean('is_public')->default(true);
    $table->integer('sort_order')->nullable();
    $table->timestamps();

    $table->index(['attachment_type', 'attachment_id', 'field'], 'system_files_master_index');
});

You can paste it as a comment here, if you like.