legend3---lavarel常用操作代码2
一、总结
一句话总结:
对于王思cong被执法人的感悟:失意时 莫心伤,得意时 莫膨胀
1、lavarel自动事务?
DB::transaction方法里面是闭包,参数用use传进去
DB::transaction(function () use ($request,$lesson) {
//dd($request->toArray());
$lesson['l_title']=$request['l_title'];
$lesson['l_introduce']=$request['l_introduce'];
$lesson['l_preview']=$request['l_preview'];
$lesson['l_is_commend']=$request['l_is_commend'];
$lesson['l_is_hot']=$request['l_is_hot'];
$lesson['l_click']=$request['l_click'];
$lesson->save();
//dd($lesson['l_id']);
//dd($lesson->toArray());
//2、插入标签课程数据--关系表
$tags=$request['tags'];
foreach ($tags as $tag){
$tag_lesson=[];
$tag_lesson['tl_t_id']=$tag;
//$tag_lesson['tl_l_id']=$lesson['l_id'];
//TagAndLesson::create($tag_lesson);
//dd($tag_lesson);
$lesson->hasManyLessonTags()->create($tag_lesson);
}
//videos数据过来的时候是json数据,true表示转成数组而非对象
$videos=json_decode($request['videos'],true);
//dd($videos);
foreach ($videos as $video){
unset($video['v_id']);
$lesson->videos()->create($video);
// $lesson->videos()->create([
// 'title'=>$video['title'],
// 'path'=>$video['path'],
// ]);
}
});
2、使用Seeder创建数据库数据?
· 生成seeder文件:php artisan make:seeder UsersTableSeeder
· 运行seeder文件:php artisan db:seed --class=UsersTableSeeder
· faker本地化:$faker=FakerFactory::create('zh_CN');
<?php use IlluminateDatabaseSeeder; class UsersTableSeeder extends Seeder { /** * Run the database seeds. * * @return void */ public function run() { //产生faker实例 $faker=FakerFactory::create('zh_CN'); //循环生成数据 static $password; $data=[]; for ($i=0;$i<10;$i++){ $data[]=[ 'phone' => $faker->phoneNumber, 'password' => $password ?: $password=bcrypt('123456'), // secret 'email' => $faker->email, 'name' => $faker->name, 'created_at' => date('Y-m-d H:i:s',time()), 'updated_at' => date('Y-m-d H:i:s',time()), ]; } DB::table('users')->insert($data); } }
3、lavarel变量输出报错情况?
@if(isset($d->blog->b_title)) {{$d->blog->b_title}} @endif
4、ajax?
主要传递回来valid和message两个变量,一个显示返回码,一个显示返回信息
视图端
//课程的点赞收藏操作 $('.fa_like').click(function () { let l_id=$(this).attr('l_id'); let _this=$(this); //console.log(l_id); $.post("/like_lesson", {'l_id':l_id,'_token':'{{csrf_token()}}'} ,function (data) { console.log(data); if(parseInt(data.valid)==1){ _this.hide(); _this.parent().find('.fa_like_no').show(); layer_alert_success(data.message); }else{ layer_alert_fail(data.message); } }); });
控制器端
//点赞课程 public function like_lesson(Request $request){ $back_data=[]; $back_data['valid']=0;//表示连接失败 $back_data['message']=''; //dd($request->all()); $ll_l_id=$request->input('l_id'); //获取登录的用户id $ll_u_id=Auth::guard('user')->user()->id; $data=[]; $data['ll_l_id']=$ll_l_id; $data['ll_u_id']=$ll_u_id; $ans=LikeLesson::insert($data); if($ans){ //验证码错误 $back_data['valid']=1;//表示验证码错误 $back_data['message']='点赞成功!'; return $back_data; }else{ $back_data['valid']=0;//表示手机验证码发送成功 $back_data['message']='点赞失败!'; } return $back_data; }
5、vue将时间戳转成时间?
methods里面加一个方法即可
<script> let vue_{{$comment_list_id}}=new Vue({ el: '#comment_list_{{$comment_list_id}}', data: { comment_list: window.{{$comment_list_id}}, }, methods:{ ts_to_time:function(ts){ return timestampToTime(ts*1000); } } }) </script>
6、转码和解码?
转码:$blog['b_summary']=addslashes(htmlspecialchars($blogSummary));
解码:$summary=stripslashes(htmlspecialchars_decode($perBlogData['b_summary']));
7、自定义排序规则 排序?
usort($question_list, array('AppModelAdminChooseQuestionTimelineGroupByTimeline',"cmp_question_collected"));
//1、可以先对数组按照时间戳来由大到小排序(因为优先显示近期的,) usort($question_list, array('AppModelAdminChooseQuestionTimelineGroupByTimeline',"cmp_question_collected")); //1、按照题目的收藏时间由大到小排序 public static function cmp_question_collected($a, $b) { if ($a['uq_collected_time'] == $b['uq_collected_time']) { return ($a['uq_id'] > $b['uq_id']) ? -1 : 1; } return ($a['uq_collected_time'] > $b['uq_collected_time']) ? -1 : 1; }
8、vue判断一个数是否在数组里面?
["a","b","c"].indexOf("a")
<script> let vue_{{$comment_list_id}}=new Vue({ el: '#comment_list_{{$comment_list_id}}', data: { comment_list: window.{{$comment_list_id}}, lesson_comment_ids:window.lesson_comment_ids, }, methods:{ ts_to_time:function(ts){ return timestampToTime(ts*1000); }, like_comment:function (cl_id) { return 1+parseInt(this.lesson_comment_ids.indexOf(cl_id)); } } }) //console.log(vue_{{$comment_list_id}}.comment_list); console.log(vue_{{$comment_list_id}}.lesson_comment_ids); </script>
9、检测windows宽度改变函数?
$(window).on('resize', function() { 代码 }).resize();
{{--小屏幕端的时候去除 内容中container 的左右缩进--}} <script> function remove_container() { if($(window).width()>720){ $('#content_container').addClass('container'); }else{ $('#content_container').removeClass('container'); } $('#content_wrapper').show(); } remove_container(); $(function () { $(window).on('resize', function() { //console.log("宽度改变了!"); //console.log($(window).width()); remove_container(); }).resize(); // window.onresize=function(){ // //console.log("宽度改变了!"); // remove_container(); // } }); </script>
10、post请求处理表单信息?
获取form的数据:$('#do_update_info_form').serializeArray();
视图端
{{--post请求提交表单信息--}} <script> function submit_update_info(){ var data = {}; var t = $('#do_update_info_form').serializeArray(); $.each(t, function() { data [this.name] = this.value; }); //console.log(JSON.stringify(data )); $.post("/do_update_info", {'data':data,'_token':'{{csrf_token()}}'} ,function (data) { //console.log(data); if(parseInt(data.valid)==1){ layer_alert_success_mobile(data.message); //操作成功,两秒后自动跳转到XX界面
//layer_mobile_success_jump(data.message,3,'个人中心','{{url('/my')}}');
}else{ layer_alert_fail_mobile(data.message); } }); } </script>
控制器端
public function do_update_info(Request $request){ $back_data=[]; $back_data['valid']=0;//表示连接失败 $back_data['message']=''; //dd($request->all()); $data=$request->input('data'); //dd($data); $name_length=mb_strlen(trim($data['u_name']),'utf8'); if($name_length>10){ $back_data['valid']=0; $back_data['message']='昵称的字符数不能超过10个'; return $back_data; } $motto_length=mb_strlen(trim($data['u_motto']),'utf8'); if($motto_length>100){ $back_data['valid']=0; $back_data['message']='个性签名 的字符数不能超过100个'; return $back_data; } if($name_length) $name=$data['u_name']; if($motto_length) $motto=$data['u_motto']; $picture=$data['u_picture']; $u_id=Auth::guard('user')->user()->id; $user=Auth::guard('user')->user(); //修改用户信息 if(isset($name)) $user->name=$name; if(isset($motto)) $user->motto=$motto; $user->picture=$picture; $ans=$user->save(); if($ans){ $back_data['valid']=1; $back_data['message']='操作成功!'; return $back_data; }else{ $back_data['valid']=0; $back_data['message']='操作失败!'; } return $back_data; //dd($user); }