Play Framework：表单数据未通过 [英] Play Framework: Form data not passed

问题描述

我正在尝试根据播放框架示例'zentask'创建一个登录页面。

I am trying to create a login page based on the play framework sample 'zentask'.

当我尝试在登录页面中提交表单时，user_name和user_pass为null。

When I try submitting the form in the login page, user_name and user_pass are null.

命令提示输出：

[info] play - database [default] connected at jdbc:mysql://localhost/smgts2
[info] play - Application started (Dev)
null null

Application.java：

Application.java:

package controllers;

import play.*;
import play.mvc.*;
import play.data.*;
import static play.data.Form.*;

import models.*;
import views.html.*;

public class Application extends Controller {

    // -- Authentication

    public static class Login {

        public String user_name;
        public String user_pass;

        public String validate() {
            if(Accounts.authenticate(user_name, user_pass) == null) {
                return "Invalid user or password";
            }
            return null;
        }

    }

    /**
     * Login page.
     */
    public static Result login() {
        return ok(
            login.render(form(Login.class))
        );
    }

    /**
     * Handle login form submission.
     */

    public static Result authenticate() {
        Form<Login> loginForm = form(Login.class).bindFromRequest();
        if(loginForm.hasErrors()) {
            return badRequest(login.render(loginForm));
        } else {
            session("user_name", loginForm.get().user_name);
            return redirect(
                routes.Home.index()
            );
        }
    }

    /**
     * Logout and clean the session.
     */

    public static Result logout() {
        session().clear();
        flash("success", "You've been logged out");
        return redirect(
            routes.Application.login()
        );
    }
}

login.scala.html

login.scala.html

@(form: Form[Application.Login])

@main(Html("School Management System")) {
    <style type="text/css">
    body {
            padding-top: 60px;
            padding-bottom: 40px;
            background-color: #f5f5f5;
    }
    </style>

    @helper.form(routes.Application.authenticate, 'class -> "form-signin") {

            <h2 class="form-signin-heading">Sign-in to SMGTS</h2>

            @if(form.hasGlobalErrors) { 
                <p class="text-error">
                    @form.globalError.message
                </p>
            }

            @if(flash.contains("success")) {
                <p class="text-success">
                    @flash.get("success")
                </p>
            }

            <p>
                <input type="text" class="input-block-level" name="user_name" placeholder="Username" value='@form("user_name").value'>
            </p>
            <p>
                <input type="password" class="input-block-level" name="user_pass" placeholder="Password">
            </p>
            <p>
                <button class="btn btn-large btn-primary" type="submit">Sign in</button>
            </p>


}
}

路线文件：

# Routes
# This file defines all application routes (Higher priority routes first)
# ~~~~

# Home page
GET     /                           controllers.Home.index()

# Authentication
GET     /login                      controllers.Application.login()
POST    /login                      controllers.Application.authenticate()
GET     /logout                     controllers.Application.logout()

# Map static resources from the /public folder to the /assets URL path
GET     /assets/*file               controllers.Assets.at(path="/public", file)

Accounts.java（模型类）：

Accounts.java (Model Class):

package models;

import java.util.*;
import javax.persistence.*;

import play.db.ebean.*;
import play.data.format.*;
import play.data.validation.*;

import com.avaje.ebean.*;

@Entity
@Table(name="user_account")
public class Accounts extends Model {

    @Id
    @Constraints.Required
    public Long acc_id;

    @Constraints.Required
    @Formats.NonEmpty
    public String user_name;

    @Constraints.Required
    @Formats.NonEmpty
    public String user_pass;

    @Constraints.Required
    public int group_id;

    // Queries

    public static Finder<Long,Accounts> find = new Finder<Long,Accounts>(Long.class, Accounts.class);

    public static Accounts authenticate(String user_name, String user_pass) {

        System.out.println(user_name + " " + user_pass); // Check if form data is passed.

        return find.where()
            .eq("user_name", user_name)
            .eq("user_pass", user_pass)
            .findUnique();

    }

}

I've been checking if the variable names in Application.java and they're the same with the input fields in login.scala.html.

推荐答案

尝试运行play clean。它应该神奇地修复它！

Try running play clean. It should magically fix it!

这篇关于Play Framework：表单数据未通过的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！