wkshi/database/migrations/2019_01_19_015139_add_col_users_table.php

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class AddColUsersTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        if(!Schema::hasColumn('users','wechat_id')){
            Schema::table('users', function (Blueprint $table) {
                $table->string('wechat_id')->after('id')->nullable()->comment('微信id');
            });
        }
        if(!Schema::hasColumn('users','mobile')){
            Schema::table('users', function (Blueprint $table) {
                $table->char('mobile',11)->after('email')->index()->comment('手机');
            });
        }

        if(!Schema::hasColumn('users','nickname')){
            Schema::table('users', function (Blueprint $table) {
                $table->string('nickname')->after('name')->nullable()->comment('昵称');
            });
        }

        if(!Schema::hasColumn('users','avatar')){
            Schema::table('users', function (Blueprint $table) {
                $table->string('avatar')->after('mobile')->nullable()->comment('头像');
            });
        }

        if(!Schema::hasColumn('users','school_id')){
            Schema::table('users', function (Blueprint $table) {
                $table->string('school_id')->after('avatar')->nullable()->comment('头像');
            });
        }

        if(!Schema::hasColumn('sclass_id','sclass')){
            Schema::table('users', function (Blueprint $table) {
                $table->integer('sclass_id')->after('school_id')->nullable()->comment('班级');
            });
        }

        if(!Schema::hasColumn('grade_id','grade')){
            Schema::table('users', function (Blueprint $table) {
                $table->integer('grade_id')->after('class_id')->nullable()->comment('班级');
            });
        }

    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        if(Schema::hasColumn('users','mobile')){
            Schema::table('users', function (Blueprint $table) {
                $table->dropColumn('mobile');
            });
        }
        if(Schema::hasColumn('users','nickname')){
            Schema::table('users', function (Blueprint $table) {
                $table->dropColumn('nickname');
            });
        }
        if(Schema::hasColumn('users','avatar')){
            Schema::table('users', function (Blueprint $table) {
                $table->dropColumn('avatar');
            });
        }
    }
}