Laravel5.5执行表迁移命令出现表为空的解决方案

摘要：今天在使用一个第三方包时，出现了这样的错误折腾了好久，终于知道了解决方法，原来是配置文件的缓存没有清理。一问题错误提示二解决方案清除配置文件缓存再次执行发布命令，就可以了

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今天在使用一个第三方包 laravel-admin 时，出现了这样的错误：SQLSTATE[42000]: Syntax error or access violation: 1103 Incorrect table name "",折腾了好久，终于知道了解决方法，原来是配置文件的缓存没有清理。

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vagrant@homestead:~/Code/laravel-shop$ php artisan admin:install

错误提示：

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In Connection.php line 664:
  SQLSTATE[42000]: Syntax error or access violation: 1103 Incorrect table name "" (SQL: create table `` (`id` int uns
  igned not null auto_increment primary key, `username` varchar(190) not null, `password` varchar(60) not null, `name
  ` varchar(255) not null, `avatar` varchar(255) null, `remember_token` varchar(100) null, `created_at` timestamp nul
  l, `updated_at` timestamp null) default character set utf8mb4 collate utf8mb4_unicode_ci)
In Connection.php line 452:
  SQLSTATE[42000]: Syntax error or access violation: 1103 Incorrect table name ""

database/migrations/2016_01_04_173148_create_admin_table.php

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create(config("admin.database.users_table"), function (Blueprint $table) {
            $table->increments("id");
            $table->string("username", 190)->unique();
            $table->string("password", 60);
            $table->string("name");
            $table->string("avatar")->nullable();
            $table->string("remember_token", 100)->nullable();
            $table->timestamps();
        });
        Schema::connection($connection)->create(config("admin.database.roles_table"), function (Blueprint $table) {
            $table->increments("id");
            $table->string("name", 50)->unique();
            $table->string("slug", 50);
            $table->timestamps();
        });
        Schema::connection($connection)->create(config("admin.database.permissions_table"), function (Blueprint $table) {
            $table->increments("id");
            $table->string("name", 50)->unique();
            $table->string("slug", 50);
            $table->string("http_method")->nullable();
            $table->text("http_path")->nullable();
            $table->timestamps();
        });
        Schema::connection($connection)->create(config("admin.database.menu_table"), function (Blueprint $table) {
            $table->increments("id");
            $table->integer("parent_id")->default(0);
            $table->integer("order")->default(0);
            $table->string("title", 50);
            $table->string("icon", 50);
            $table->string("uri", 50)->nullable();
            $table->timestamps();
        });
        Schema::connection($connection)->create(config("admin.database.role_users_table"), function (Blueprint $table) {
            $table->integer("role_id");
            $table->integer("user_id");
            $table->index(["role_id", "user_id"]);
            $table->timestamps();
        });
        Schema::connection($connection)->create(config("admin.database.role_permissions_table"), function (Blueprint $table) {
            $table->integer("role_id");
            $table->integer("permission_id");
            $table->index(["role_id", "permission_id"]);
            $table->timestamps();
        });
        Schema::connection($connection)->create(config("admin.database.user_permissions_table"), function (Blueprint $table) {
            $table->integer("user_id");
            $table->integer("permission_id");
            $table->index(["user_id", "permission_id"]);
            $table->timestamps();
        });
        Schema::connection($connection)->create(config("admin.database.role_menu_table"), function (Blueprint $table) {
            $table->integer("role_id");
            $table->integer("menu_id");
            $table->index(["role_id", "menu_id"]);
            $table->timestamps();
        });
        Schema::connection($connection)->create(config("admin.database.operation_log_table"), function (Blueprint $table) {
            $table->increments("id");
            $table->integer("user_id");
            $table->string("path");
            $table->string("method", 10);
            $table->string("ip", 15);
            $table->text("input");
            $table->index("user_id");
            $table->timestamps();
        });
    }
    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        $connection = config("admin.database.connection") ?: config("database.default");
        Schema::connection($connection)->dropIfExists(config("admin.database.users_table"));
        Schema::connection($connection)->dropIfExists(config("admin.database.roles_table"));
        Schema::connection($connection)->dropIfExists(config("admin.database.permissions_table"));
        Schema::connection($connection)->dropIfExists(config("admin.database.menu_table"));
        Schema::connection($connection)->dropIfExists(config("admin.database.user_permissions_table"));
        Schema::connection($connection)->dropIfExists(config("admin.database.role_users_table"));
        Schema::connection($connection)->dropIfExists(config("admin.database.role_permissions_table"));
        Schema::connection($connection)->dropIfExists(config("admin.database.role_menu_table"));
        Schema::connection($connection)->dropIfExists(config("admin.database.operation_log_table"));
    }
}

清除配置文件缓存

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vagrant@homestead:~/Code/laravel-shop$ php artisan config:cache

再次执行发布命令，就可以了：

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vagrant@homestead:~/Code/laravel-shop$ php artisan admin:install
Migrating: 2016_01_04_173148_create_admin_table
Migrated:  2016_01_04_173148_create_admin_table
Admin directory was created: /app/Admin
HomeController file was created: /app/Admin/Controllers/HomeController.php
ExampleController file was created: /app/Admin/Controllers/ExampleController.php
Bootstrap file was created: /app/Admin/bootstrap.php
Routes file was created: /app/Admin/routes.php
vagrant@homestead:~/Code/laravel-shop$