Play Framework 完整实现一个APP（十三）

添加用户编辑区

1.修改Admin.index()

public static void index() {
    List<Post> posts = Post.find("author.email", Security.connected()).fetch();
    render(posts);
}

　　

2.修改页面 app/views/Admin/index.html

#{extends 'admin.html' /}
 
<h3>Welcome ${user}, <span>you have written ${posts.size() ?: 'no'} ${posts.pluralize('post', 'posts')} so far</span></h3>
 
#{list items:posts, as:'post'}
    <p class="post ${post_parity}">
        <a href="#">${post.title}</a>
    </p>
#{/list}
 
<p id="newPost" >
    <a href="#"><span>+</span> write a new post</a>
</p>

个人展示页完成

3.添加新增Post页面

Admin新增Action

public static void form() {
    render();
}
 
public static void save() {
    // Not implemented yet
}

添加路由

GET     /admin/new                          Admin.form
POST    /admin/new                          Admin.save

　　

创建页面 /app/views/Admin/form.html 

#{extends 'admin.html' /}

<h3>Write, <span>a new post</span></h3>

#{form @save()}
	#{ifErrors}
        <p class="error">
            Please correct these errors.
        </p>
	#{/ifErrors}	
	
	 <p>
        #{field 'title'}
        <label>Post title:</label>
        <input type="text" name="${field.name}" 
            value="${post?.title}" class="${field.errorClass}" />
        #{/field}
    </p>
    
    <p>
        #{field 'content'}
        <label>Write here:</label>
        <textarea name="${field.name}" 
            class="${field.errorClass}">${post?.content}</textarea>
        #{/field}
    </p>
    
    <p>
        #{field 'tags'}
        <label>Enter some tags:</label>
        <input type="text" size="50" 
            name="${field.name}" value="${post?.tags?.join(' ')}" />
        #{/field}
    </p>
    
    <p>
        <input type="submit" value="Publish this post to the blog" />
    </p>

#{/form}

　　

Admin.index.html 添加Post按钮

<p id="newPost" >
    <a href="@{form()}"><span>+</span> write a new post</a>
</p>

　　

3.完善Admin.Save方法

public static void save(String title, String content, String tags) {
    // Create post
    User author = User.find("byEmail", Security.connected()).first();
    Post post = new Post(author, title, content);
    // Set tags list
    for(String tag : tags.split("\s+")) {
        if(tag.trim().length() > 0) {
            post.tags.add(Tag.findOrCreateByName(tag));
        }
    }
    // Validate
    validation.valid(post);
    if(validation.hasErrors()) {
        render("@form", post);
    }
    // Save
    post.save();
    index();
}

新建Post可以保存了

4.修改Admin.form

public static void form(Long id) {
    if(id != null) {
        Post post = Post.findById(id);
        render(post);
    }
    render();
}

　　

修改Admin/index.html 

#{list items:posts, as:'post'}
    <p class="post ${post_parity}">
        <a href="@{Admin.form(post.id)}">${post.title}</a>
    </p>
#{/list}

　　

添加Route

GET     /admin/myPosts/{id}                 Admin.form
GET     /admin/new                          Admin.form

　　

5.修改 app/views/Admin/form.html 

#{extends 'admin.html' /}
 
#{ifnot post?.id}
    <h3>Write, <span>a new post</span></h3>
#{/ifnot}
#{else}
    <h3>Edit, <span>this post</span></h3>
#{/else}
 
#{form @save(post?.id)}
 
    #{ifErrors}
        <p class="error">
            Please correct these errors.
        </p>
    #{/ifErrors}
     
    <p>
        #{field 'title'}
        <label>Post title:</label>
        <input type="text" name="${field.name}" 
            value="${post?.title}" class="${field.errorClass}" />
        #{/field}
    </p>
 
    <p>
        #{field 'content'}
        <label>Write here:</label>
        <textarea name="${field.name}" 
            class="${field.errorClass}">${post?.content}</textarea>
        #{/field}
    </p>
 
    <p>
        #{field 'tags'}
        <label>Enter some tags:</label>
        <input type="text" size="50" 
            name="${field.name}" value="${post?.tags?.join(' ')}" />
        #{/field}
    </p>
    
    <p>
        <input type="submit" value="Publish this post to the blog" />
    </p>
    
#{/form}

　　

改进Admin.Save方法

public static void save(Long id, String title, String content, String tags) {
    Post post;
    if(id == null) {
        // Create post
        User author = User.find("byEmail", Security.connected()).first();
        post = new Post(author, title, content);
    } else {
        // Retrieve post
        post = Post.findById(id);
        // Edit
        post.title = title;
        post.content = content;
        post.tags.clear();
    }
    // Set tags list
    for(String tag : tags.split("\s+")) {
        if(tag.trim().length() > 0) {
            post.tags.add(Tag.findOrCreateByName(tag));
        }
    }
    // Validate
    validation.valid(post);
    if(validation.hasErrors()) {
        render("@form", post);
    }
    // Save
    post.save();
    index();
}

添加Route

POST    /admin/myPosts/{id}                  Admin.save
POST    /admin/new                           Admin.save

　　

。。