检查Laravel迁移文件中是否存在列

Question

Already I have a table name table_one. Now I want to add two more columns to it. Everything works fine so far. But in my method, I want to check a column exists or not in my table like dropIfExists('table').

/**
 * Run the migrations.
 *
 * @return void
 */
public function up()
{
    Schema::table('table_one', function (Blueprint $table) {
        $table->string('column_one')->nullable();
        $table->string('column_two')->nullable();
    });
}

/**
 * Reverse the migrations.
 *
 * @return void
 */
public function down()
{
    Schema::table('table_one', function (Blueprint $table) {
        // in here i want to check column_one and column_two exists or not
        $table->dropColumn('column_one');
        $table->dropColumn('column_two');
    });
}

Answer 1

You need something just like this

  public function down()
    {
        if (Schema::hasColumn('users', 'phone'))
        {
            Schema::table('users', function (Blueprint $table)
            {
                $table->dropColumn('phone');
            });
        }
    }