如果存在多个表单，如何将“addGlobalError（）”分配给正确的表单(How to assign “addGlobalError()” to correct form if several f

我在同一页面上有登录和注册表单，我尝试仅在相关表单上返回全局错误消息。 我该怎么做呢？

import org.omnifaces.util.Messages;

// login class submit()
Messages.addGlobalError('Login failed');

// register class submit()
Messages.addGlobalError('Register failed');
 
<h:form id="login-form">    
    <h:messages globalOnly="true" />    
    // [...]                            
    <h:commandButton value="Login" action="#{login.submit()}" />    
</h:form>    
<h:form id="register-form">    
    <h:messages globalOnly="true" />    
    // [...]                            
    <h:commandButton value="Sign up" action="#{register.submit()}" />    
</h:form>
I have a login and a register form on one and the same page and I try to return the global error message only on the concerning form. How to I do that correctly?
 
import org.omnifaces.util.Messages;

// login class submit()
Messages.addGlobalError('Login failed');

// register class submit()
Messages.addGlobalError('Register failed');
 
<h:form id="login-form">    
    <h:messages globalOnly="true" />    
    // [...]                            
    <h:commandButton value="Login" action="#{login.submit()}" />    
</h:form>    
<h:form id="register-form">    
    <h:messages globalOnly="true" />    
    // [...]                            
    <h:commandButton value="Sign up" action="#{register.submit()}" />    
</h:form>

                
最满意答案
                
                    
                        
 这是一个矛盾的......你根本不会将全局错误分配给特定组件（表单是一个组件）。 
 
 
 
 只需使用您分配给表单id的错误 
Messages.addError(id, error);
 
 
 添加<h:message for="...">其中for包含表单的id 。 
 
 
 
 以下是您的示例应如何显示： 
 
import org.omnifaces.util.Messages;

// login class submit()
Messages.addError('login-form', 'Login failed');

// register class submit()
Messages.addError('register-form', 'Register failed');
 
<h:form id="login-form">    
    <h:messages globalOnly="true" for="login-from" />    
    // [...]                            
    <h:commandButton value="Login" action="#{login.submit()}"/>    
</h:form>    
<h:form id="register-form">    
    <h:messages globalOnly="true" for="register-from" />    
    // [...]                            
    <h:commandButton value="Sign up" action="#{register.submit()}"/>    
</h:form>
That is a contradictory... you simply never assign a global error to a specific component (the form is a component). 
 
 
 
Simply make an error that you assign to the id of the form by using 
 Messages.addError(id, error);
 
 
add a <h:message for="..."> where the for contains the id of the form.
 
 
 
Here is how your example should look like:
 
import org.omnifaces.util.Messages;

// login class submit()
Messages.addError('login-form', 'Login failed');

// register class submit()
Messages.addError('register-form', 'Register failed');
 
<h:form id="login-form">    
    <h:messages globalOnly="true" for="login-from" />    
    // [...]                            
    <h:commandButton value="Login" action="#{login.submit()}"/>    
</h:form>    
<h:form id="register-form">    
    <h:messages globalOnly="true" for="register-from" />    
    // [...]                            
    <h:commandButton value="Sign up" action="#{register.submit()}"/>    
</h:form>