你好我正在开发一个带有RoR的表单生成器,当我有一个'多选'问题时,我想只允许2个复选框。我编写了一个适用于此示例的JavaScript:
<div>
<h4>
Form 1
</h4>
<form id="form_1">
<input type="checkbox" value="1">
<input type="checkbox" value="2">
<input type="checkbox" value="3">
</form>
</div>
<div>
<h4>
Form 2
</h4>
<form id="jj">
<input type="checkbox" name="group" value="1">
<input type="checkbox" name="group" value="2">
<input type="checkbox" name="group" value="3">
</form>
<script>
$(function() {
$('form input[type=checkbox]').on('change', function(e) {
var MyForm=this.parentNode.id;
if ($('form[id='+MyForm+'] input[type=checkbox]:checked').length == 2) {
$('form[id='+MyForm+'] input[type=checkbox]:not(:checked)').prop('disabled', 'disabled');
}else{
$('form[id='+MyForm+'] input[type=checkbox]:not(:checked)').prop('disabled', false);
}
});
});
我如何适应使其适用于我的Ruby代码:
<%= form_for([@formulaire, @formulaire.polls.new]) do |f| %>
<% @formulaire.questions.each_with_index do |question, i| %>
<li>
<div>
<form id="form">
<%= question.nom.html_safe %>
<ul>
<% if question.typequestion == "choix_multiple"%>
<% question.answers.each_with_index do |answer, j| %>
<div>
<% a= Answer.find_by_sql(["Select * from answers where id=?", answer.id]).as_json(only: [:question_id,:content]) %>
<%= check_box_tag :"nom_#{i}_#{j}", answer.id %>
<%= f.label :"nom_#{answer.content}", answer.content%> <% answer.id%>
<br/>
</div>
<% end %>
<% elsif question.typequestion == "choix_simple"%>
(...)
<%= f.submit "Valider les réponses", class:"pull-right btn btn-primary" %>
<% end %>
答案 0 :(得分:1)
jQuery没有与表单链接。简单的解决方案是为每个表单添加一个类,并在选择器中使用该类。
$(document).ready(function() {
$('.form input[type=checkbox]').on('change', function(e) {
var MyForm=this.parentNode.id;
if ($('form[id='+MyForm+'] input[type=checkbox]:checked').length == 2) {
$('form[id='+MyForm+'] input[type=checkbox]:not(:checked)').prop('disabled', 'disabled');
}else{
$('form[id='+MyForm+'] input[type=checkbox]:not(:checked)').prop('disabled', false);
}
});
});
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<div>
<h4>
Form 1
</h4>
<form id="form_1" class="form">
<input type="checkbox" value="1">
<input type="checkbox" value="2">
<input type="checkbox" value="3">
</form>
</div>
<div>
<h4>
Form 2
</h4>
<form id="jj" class="form">
<input type="checkbox" name="group" value="1">
<input type="checkbox" name="group" value="2">
<input type="checkbox" name="group" value="3">
</form>
&#13;
在您的Ruby代码中
<%= form_for([@formulaire, @formulaire.polls.new]) do |f| %>
<% @formulaire.questions.each_with_index do |question, i| %>
<li>
<div>
<form id="form" class="form">
<%= question.nom.html_safe %>
<ul>
<% if question.typequestion == "choix_multiple"%>
<% question.answers.each_with_index do |answer, j| %>
<div>
<% a= Answer.find_by_sql(["Select * from answers where id=?", answer.id]).as_json(only: [:question_id,:content]) %>
<%= check_box_tag :"nom_#{i}_#{j}", answer.id %>
<%= f.label :"nom_#{answer.content}", answer.content%> <% answer.id%>
<br/>
</div>
<% end %>
<% elsif question.typequestion == "choix_simple"%>
(...)
<%= f.submit "Valider les réponses", class:"pull-right btn btn-primary" %>
<% end %>