php - 数据库某个字段没有默认值

mysqlerror.

SQLSTATE[HY000]:Generalerror:1364Field'uuid'doesn'thaveadefaultvalue(SQL:insertinto`comments`(`markdown`,`updated_at`,`created_at`)values(Hello,2016-11-2414:51:13,2016-11-2414:51:13))

CommentController

/***Createcomment.**@paramRequest$request**@returnjson*/publicfunctioncommentCreate(CommentCreateRequest$request){try{$currentUser=JWTAuth::parseToken()->authenticate();$input=$request->input();$html=Parsedown::instance()->text($input['markdown']);$uuid=UUID::uuid1()->toString();$status='published';$input=array_add($input,'uuid',$uuid);$input=array_add($input,'html',$html);$input=array_add($input,'status',$status);$input=array_add($input,'user_id',$currentUser->id);$input=array_add($input,'created_at',Carbon::now());//return$input;$comment=$this->comment->create($input);returnresponse()->json(['code'=>0,'data'=>$comment,]);}catch(ValidationException$e){returnresponse()->json(['code'=>ErrorCode::FAILED_TO_CREATE_THE_COMMENT,'message'=>ErrorMessage::FAILED_TO_CREATE_THE_COMMENT,]);}catch(QueryException$e){returnresponse()->json(['code'=>ErrorCode::FAILED_TO_CREATE_THE_COMMENT,//'message'=>ErrorMessage::FAILED_TO_CREATE_THE_COMMENT,'message'=>$e->getMessage(),]);}

migration

/***Runthemigrations.*/publicfunctionup(){Schema::create('comments',function(Blueprint$table){$table->uuid('uuid');$table->increments('id');$table->integer('user_id')->unsigned();$table->integer('post_id')->unsigned();$table->text('markdown');$table->text('html');$table->string('status');$table->timestamps();$table->softDeletes();$table->engine='InnoDB';});}

补充：

主要是其他表也有uuid这个表，比如Post表，就没有问题。

我把uuid字段删除后，又报下面的错误：

SQLSTATE[HY000]:Generalerror:1364Field'user_id'doesn'thaveadefaultvalue(SQL:insertinto`comments`(`markdown`,`updated_at`,`created_at`)values(Hello,2016-11-2415:29:11,2016-11-2415:29:11))