如何将复选框设置为true或false ..我已尝试过所有这些组合:
<%= check_box_tag 'prefs[can_be_email_notified]', :id => 'user_preferences_can_email'%> Email
<%= check_box_tag 'prefs[can_be_email_notified]', '', :id => 'user_preferences_can_email'%> Email
<%= check_box_tag 'prefs[can_be_email_notified]', '', :checked =>'',:id => 'user_preferences_can_email'%> Email
尝试使用这些
更改复选框document.getElementById("user_preferences_can_email").checked = true;
document.getElementById("user_preferences_can_email").value = true;
document.getElementById("user_preferences_can_email").checked.value = true;
也许我不清楚......
我有一组设置为按钮的值,并希望更改要在按钮上设置的值上取消选中或取消选中的复选框,
即:
function doubleClickUser(can_email, can_screen) {
document.getElementById("user_preferences_can_email").checked = can_email;
document.getElementById("user_preferences_can_screen").checked = can_screen;
}
<button class="button" onclick="doubleClickUser('true','false')"><%= user[:email] %></button>
<%= check_box_tag 'prefs[can_be_email_notified]', :id => 'user_preferences_can_email'%> Email
<%= check_box_tag 'prefs[can_be_screen_notified]', :id => 'user_preferences_can_screen' %> Screen
答案 0 :(得分:0)
如果您想要检查,请尝试:
EMAIL
<%= check_box_tag "email",params[:email].to_s , {:checked => true} %>
此外,如果你想要一个值,你可以试试这个:
<%= check_box_tag "email", "5", params[:email].to_s == "5", {:checked => true} %>
答案 1 :(得分:0)
在控制器或模型中设置字段的值,然后只需在标准的Rails表单中包含该元素:
# controller
@pref = Pref.new (or Pref.find(params[:id])
# view
<%= form_for @pref do |f| %>
<%= f.label :can_be_email_notified %>
<%= f.check_box :can_be_email_notified %>
<% end %>
这将反映can_be_email_notified
@pref的任何值。
答案 2 :(得分:0)
想出来,你必须先将状态设置为false
<%= check_box_tag 'prefs[can_be_email_notified]', '', false, :id => 'user_preferences_can_email' %> Email <br>
<%= check_box_tag 'prefs[can_be_screen_notified]', '', false, :id => 'user_preferences_can_screen' %> Screen <br>
<%= check_box_tag 'prefs[can_be_sms_notified]', '', false, :id => 'user_preferences_can_sms' %> Text </div></th>