Eloquent错误地将多个模型保存到数据库

Question

I have a controller that creates a new model then passes it to the view

public function fill_site_form($id, $step_id, $form_id){
    $form = new FormEntry();
    $form->site_id = $id;
    $form->form_id = $form_id;
    $form->step_id = $step_id;
    $form->entry_json = Form::find($form_id)->form_json;
    $form->save();
    return view('sites.fill_site_form', ['form' => $form]);
}

I need it to only create one record in the db but it creates 2 records everytime I go to that route.

I have removed the ->save and then no records are inserted into the DB.

Any suggestions?

Edit:

1. Image of DB entries on the $form->save: SCREENSHOT IMAGE LINK

2. The DB Schema:

   Schema::create('form_entries', function (Blueprint $table) {
       $table->increments('id');
       $table->integer('site_id');
       $table->integer('form_id');
       $table->integer('step_id');
       $table->text('entry_json', 600000);
       $table->timestamps();
   });
   

3. The code that receives the ajax from the sites.fill_site_form view

   public function update_site_ajax($id, Request $request){
       $entry = FormEntry::find($id);
       $entry->entry_json = json_encode($request->form_json);
       $entry->save();
       return $request->all();
   }
   

4. Front end AJAX code:

       $('#submit_button').click((e)=>{
           $.ajax({
               type:'PATCH',
               url:'/site/' + document.getElementById('form_id').value,
               data:  {'form_json' : renderer.userData},
   
               success:function(data){
                   $.notify("Form successfully Updated!",
                       {
                           position:"top center",
                           className: 'success'
                       }
                   );
                   console.log('Response: ', data)
               }
   
           });
       });
   

Answer 1

I couldn't get it working with Model::create or Model->save, So I resorted to Model::firstOrCreate which looks more stable, still would like to know why only on that model it creates two entries