forms

问题 I try to make a form with category and subcategory like the picture below : So, I made my form like that : ->add('souscategorie', EntityType::class, array( 'label' => false, 'class' => 'App:souscategorie', 'query_builder' => function(EntityRepository $er) { return $er->createQueryBuilder('souscategorie') ->leftJoin('souscategorie.categorie', 'categorie') ->addSelect('souscategorie') ->addSelect('categorie') ; }, 'expanded'=> true, 'multiple'=> true, 'choice_label' => function($sousCategorie){

问题 This question already has answers here : How can I get useful error messages in PHP? (44 answers) “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP (28 answers) Closed 3 months ago . <?php if (isset ($_POST['contact-form'])) { $name = trim($_POST['name']); $email = trim($_POST['email']); $msg = $_POST['message']; // add the recipient email to a variable $to = "myemail@gmail.com"; //create a subject $subject = "$name sent you a message about a

问题 This question already has answers here : How can I get useful error messages in PHP? (44 answers) “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP (28 answers) Closed 3 months ago . <?php if (isset ($_POST['contact-form'])) { $name = trim($_POST['name']); $email = trim($_POST['email']); $msg = $_POST['message']; // add the recipient email to a variable $to = "myemail@gmail.com"; //create a subject $subject = "$name sent you a message about a

问题 I realise that my formRef.form.controls returns an empty array in ngAfterViewInit. I use template-driven form and there are 4 elements in the form. They are available after some time. But I need them to be in formRef.form.controls . So, can I subscribe to some event which signals that the form is ready? Or use some other approach? Here is the small StackBlitz example: https://stackblitz.com/edit/angular-ngafterviewinit-quirks 来源： https://stackoverflow.com/questions/55728910/why-is-formgroup

问题 I've seen a few tutorials where you can copy the value of a select option into a hidden field like this: $("#my_stuff").change(function(){ $("#my_hidden_field").val($("select option:selected").val()); }); So if I had this... <select name="my_stuff" id="my_stuff"> <option value="Red">Red things</option> <option value="Green">Green things</option> <option value="Blue">Blue things</option> </select> ...and selected 'Red things', then 'Red things' would be copied into the hidden field value. But

问题 Hope yo are all doing great. I am using Laravel 5.3 and a package LaravelCollective for form-model binding. I have subjects array that I want to validate and then store in database if there is no error in the input data. The following snippets show the partial view of form, other views, rules for validations and controller code. UserProfile.blade.php <!-- Panel that Adds the Subject - START --> <div class="col-md-12"> <div class="panel panel-default" id="add_Subject_panel"> <div class="panel

问题 I am building my first app with Xamarin forms, an EPUB reader. The core app is now working well and able to render documents. The question I am trying to answer is how I can register for my app as a handler for the EPUB document type so that if the file is opened from an email app my reader app will be available as a reader? Ideally this should be a cross platform solution. Thanks! 回答1: Ideally this should be a cross platform solution. Unfortunately, there is no cross platform solution that

问题 I am building my first app with Xamarin forms, an EPUB reader. The core app is now working well and able to render documents. The question I am trying to answer is how I can register for my app as a handler for the EPUB document type so that if the file is opened from an email app my reader app will be available as a reader? Ideally this should be a cross platform solution. Thanks! 回答1: Ideally this should be a cross platform solution. Unfortunately, there is no cross platform solution that

问题 I am trying to use this library "react-jsonschema-form" to create forms using react and jsonschema. I am trying to use it in my project as described in the example from the website by including the .js file via cdn. It is not working. The exported component "Form" is undefined. I had a look at this similar question Using React component from js source maps but I could not understand the solution offered. I am supposed to alias the default export of JSONSchemaForm. But what is JSONSchemaForm?

问题 The geocodeAddress() function uses fetch to send a http request. Before I added "event.preventDefault()" as a parameter to the function, it would not run properly (TypeError: Network Error) as the request was being interrupted by the page reloading caused by the form being sent. However, once I added it, the form no longer gets sent. I don't think the problem lies with the php code as I have not altered it at all. What could be causing this? I had the same error in this post before 'TypeError