Ruby-on-rails Rails：form_for 和单选按钮
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Rails: form_for and radio buttons
提问by dennismonsewicz
I have the following in my form_for
我有以下内容 form_for
<div class="multiple_students">
<%= f.label :multiple_classes, "Do you teach multiple classes?" %>
<%= f.radio_button :multiple_classes, 1, checked: @user.multiple_classes?, class: 'multiple_classes', data: { question: 'What is your average class size?' } %> <%= f.label :multiple_classes, "Yes", class: 'multiple_classes' %>
<%= f.radio_button :multiple_classes, 0, checked: @user.multiple_classes?, class: 'multiple_classes', data: { question: 'How many kids do you teach?' } %> <%= f.label :multiple_classes, "No", class: 'multiple_classes' %>
</div>
<div class="number_of_students hide">
<%= f.label :students %>
<%= f.text_field :students, :class=>"student_count required digits" %>
</div>
For some reason the "No" is ALWAYS checked even if the multiple_classesattribute on the user is selected a true in the database (multiple_classesis a boolean type in the database)
出于某种原因，即使multiple_classes用户的属性在数据库中选择为真（数据库multiple_classes中的布尔类型），也始终检查“否”
回答by Sri
Ok if you want to use only the radio_buttons, check the following and let me know if thats worked.
好的，如果您只想使用 radio_buttons，请检查以下内容并让我知道这是否有效。
<%= f.radio_button :multiple_classes, "1", checked: @user.multiple_classes?, class: 'multiple_classes', data: { question: 'What is your average class size?' } %> <%= f.label :multiple_classes, "Yes", class: 'multiple_classes' %>
<%= f.radio_button :multiple_classes, "0", checked: @user.multiple_classes?, class: 'multiple_classes', data: { question: 'How many kids do you teach?' } %> <%= f.label :multiple_classes, "No", class: 'multiple_classes' %>
put the 1and 0with quotes and try....
把1and0加引号并尝试....
Its not an answer... its only an idea...
它不是一个答案......它只是一个想法......
回答by rakvium
The problem with always checked "No" is in a typo.
始终选中“否”的问题在于打字错误。
If you revert @user.multiple_classes?for "No", checkbox will be unchecked if @user.multiple_classes?is true, so the next code chunk should work fine:
如果恢复@user.multiple_classes?了"No"，复选框将被选中，如果@user.multiple_classes?是true，那么下一个代码块应该能正常运行：
<%= f.radio_button :multiple_classes, 1, checked: @user.multiple_classes?, class: 'multiple_classes', data: { question: 'What is your average class size?' } %> <%= f.label :multiple_classes, "Yes", class: 'multiple_classes' %>
<%= f.radio_button :multiple_classes, 0, checked: [email protected]_classes?, class: 'multiple_classes', data: { question: 'How many kids do you teach?' } %> <%= f.label :multiple_classes, "No", class: 'multiple_classes' %>
