增:
//save返回true false $res = new member(); res->username = 'a'; $res->password = 'b'; dd($res->save());
//返回插入数据的数组array $res = member::create(['username'=>'add','password'=>'addp'])->asArray(); dd($res); //create只能添加一条,如果需要批量插入用insert Member::insert($data)
//先去数据库中找,如果没有找到则创建,返回的都是对象 $res = member::firstOrCreate(['username'=>'asfsds']); dd($res['id']);
删:
//通过主键删除 返回删除的条数 $res = member::destroy(13); member::destroy([1, 2, 3]); member::destroy(1, 2, 3); dd($res);
//通过查询删除,返回删除条数 $res = member::where('id',12)->delete(); dd($res);
改:
//返回修改成功的条数 $res = member::where('username','XJ')->update(['username'=>'xj']); dd($res);
//save()返回true or false $res = member::where('username','xj')->first(); $res->username = 'XJ'; if ($res->save()){ dd('修改成功'); } else { dd('修改失败'); }
查:
查询一条信息:
// 通过主键获取模型... model::find(1); // 获取匹配查询条件的第一个模型... model::where('id', 1)->first();
//如果有时候你可能想要在模型找不到的时候抛出异常(如果没找到跳转到404页面) model::findOrFail(1); model::where('id','>',0)->firstOrFail();
获取聚合:例如count
、sum
、max
model::where('active', 1)->count(); model::where('active', 1)->max('col');
判断查询结果是否为空,并且转成数组
$result = Model::where(...)->get(); //不为空则 if ($result->first()) { } if (!$result->isEmpty()) { } if ($result->count()) { }
多条件查询:
$res = member::where('id','>',0)->where('username','aaa')->get(); or $res = member::where([['id','>',0],['username','aaa']])->get();
IN查询
//可以用get获取单个字段,但是也必须是数组类型 $res = member::whereIn('id',[1,2,3])->get(['username'])->toArray(); $res = member::whereNotIn('id',[1,2,3])->get()->toArray();
between查询
$res = member::whereBetween('id',[1,3])->get()->toArray(); $res = member::whereNotBetween('id',[1,3])->get()->toArray();
null/notnull查询
$res = member::whereNull('username')->get()->toArray(); $res = member::whereNotNull('username')->get()->toArray();