404關於設置關聯資源

我對Spring Data Rest的第一個實驗失敗了。我採取了「入門」並對其進行了一些修改，以創建兩個具有多對一關係的實體。這些實體是Book和Shelve，許多書籍可以共享一個擱置。404關於設置關聯資源

的Shelve實體看起來是這樣的：

package hello; 

import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 

@Entity 
public class Shelve 
{ 
    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private long id; 

    private int length; 

    public int getLength() { 
     return length; 
    } 

    public void setLength(int length) { 
     this.length = length; 
    } 
}

的Book是指它：

package hello; 

import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.ManyToOne; 

@Entity 
public class Book 
{ 
    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private long id; 

    private String title; 

    @ManyToOne 
    private Shelve shelve; 

    public String getTitle() { 
     return title; 
    } 

    public void setTitle(String title) { 
     this.title = title; 
    } 

    public Shelve getShelve() { 
     return shelve; 
    } 

    public void setShelve(Shelve shelve) { 
     this.shelve = shelve; 
    } 
}

整個項目可here in GitHub。

現在，我可以添加一個擱置：

curl -i -X POST -H "Content-Type:application/json" -d "{ \"length\" : \"30\" }" http://localhost:8080/shelves 
HTTP/1.1 201 
Location: http://localhost:8080/shelves/1 
Content-Type: application/hal+json;charset=UTF-8 
Transfer-Encoding: chunked 
Date: Thu, 17 Nov 2016 16:05:02 GMT 

{ 
    "length" : 30, 
    "_links" : { 
    "self" : { 
     "href" : "http://localhost:8080/shelves/1" 
    }, 
    "shelve" : { 
     "href" : "http://localhost:8080/shelves/1" 
    } 
    } 
}

然後一本書：

curl -i -X POST -H "Content-Type:application/json" -d "{ \"title\" : \"The Battle of Life\" }" http://localhost:8080/books 
HTTP/1.1 201 
Location: http://localhost:8080/books/1 
Content-Type: application/hal+json;charset=UTF-8 
Transfer-Encoding: chunked 
Date: Thu, 17 Nov 2016 16:05:02 GMT 

{ 
    "title" : "The Battle of Life", 
    "_links" : { 
    "self" : { 
     "href" : "http://localhost:8080/books/1" 
    }, 
    "book" : { 
     "href" : "http://localhost:8080/books/1" 
    }, 
    "shelve" : { 
     "href" : "http://localhost:8080/books/1/shelve" 
    } 
    } 
}

然後我嘗試把書放在貨架，但失敗：

curl -i -X PUT -H "ContentType: text/uri-list" -d "http://localhost:8080/shelves/1" http://localhost:8080/books/1/shelve 
HTTP/1.1 404 
Content-Type: application/json;charset=UTF-8 
Transfer-Encoding: chunked 
Date: Thu, 17 Nov 2016 16:05:02 GMT 

{"timestamp":1479398702523,"status":404,"error":"Not Found","message":"No message available","path":"/books/1/shelve"}

任何想法這裏有什麼問題嗎？

來源

2016-11-17 Bert

可能需要指定的「擱置」端的鏈接，並嘗試本書添加到貨架

//擱置模型

@OneToMany(mappedBy = "shelve") 
public Set<Book> getBooks() { 
    return books; 
} 

public void setBooks(Set<Book> books) { 
    this.books = books; 
}

//添加捲曲書擱置

curl -i -X PUT -H "ContentType: text/uri-list" -d "http://localhost:8080/books/1" http://localhost:8080/shelve/1/books

來源

2016-11-17 16:58:00 kuhajeyan

這可能會起作用，但那不是我想要的模型。上面的代碼顯然只是探索Spring Data Rest。我需要一個ManyToOne。 – Bert

@伯特你加了@ onetomany otherside部分並嘗試了ManyToOne的補充？ – kuhajeyan

不，我沒有那樣做，因爲我不想在我的模型中有這個。我需要一種單向可導航的關係。 – Bert

正如Oliver Gierke在the related JIRA ticket中指出的那樣，該問題出現在curl請求中。它應該有一個連字符在Content-Type：

curl -i -X PUT -H "Content-Type: text/uri-list" -d "http://localhost:8080/shelves/1" http://localhost:8080/books/1/shelve 
HTTP/1.1 204 
Date: Sat, 19 Nov 2016 16:50:24 GMT

所以一切正常，只要你用正確的方式:)

@Oliver：非常感謝！

來源

2016-11-19 16:56:39 Bert

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