[英]How to use patch method in google app engine endpoints
I have a model called Bike, i am able to insert,get,list the object. 我有一个名为Bike的模型,我能够插入,获取,列出对象。 But now i want to update only the price of the Bike Object on the google app engine keeping all the remaining fields as it is.
但是现在我只想更新Google应用程序引擎上Bike Object的价格,并保持所有剩余字段不变。 So i have gone through the patch method.
所以我经历了补丁方法。 I am not getting how to use the patch method in google app engine endpoint to update only the price.
我没有得到如何在Google App Engine端点中使用补丁方法来仅更新价格。
This is my Bike model 这是我的自行车模特
@Entity
public class Bike { 公共课自行车{
@Id
protected Long id;
@Index
protected String imageUrl;
@Index
protected String title;
@Index
protected String price;
@Index
protected String kmpl;
@Index
protected String cc;
@Index
protected String make;
public Bike(){}
public Bike(String s, String s1, String s2,
String s3, String s4,String s5) {
this.title = s;
this.cc = s1;
this.kmpl = s2;
this.price = s3;
this.imageUrl=s4;
this.make=s5;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public String getKmpl() {
return kmpl;
}
public void setKmpl(String kmpl) {
this.kmpl = kmpl;
}
public String getCc() {
return cc;
}
public void setCc(String cc) {
this.cc = cc;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getImageUrl() {
return imageUrl;
}
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getMake() {
return make;
}
public void setMake(String make) {
this.make = make;
}
}
this is my insert api 这是我的插入api
/**
* Inserts a new {@code Bike}.
*/
@ApiMethod(
name = "insert",
path = "bike",
httpMethod = ApiMethod.HttpMethod.POST)
public Bike insert(Bike bike) {
// Typically in a RESTful API a POST does not have a known ID (assuming the ID is used in the resource path).
// You should validate that bike.id has not been set. If the ID type is not supported by the
// Objectify ID generator, e.g. long or String, then you should generate the unique ID yourself prior to saving.
//
// If your client provides the ID then you should probably use PUT instead.
ofy().save().entity(bike).now();
logger.info("Created Bike with ID: " + bike.getId());
return ofy().load().entity(bike).now();
}
in the similar way i want to use patch method to update only the price of Bike. 以类似的方式,我想使用补丁方法仅更新Bike的价格。
I don't think you can use the PATCH HTTP method with Google Cloud Endpoints, see the doc for @ApiMethod Annotation which says "Methods that take an entity as a parameter should use HttpMethod.POST (for insert operations) or HttpMethod.PUT (for update operations)" ( https://cloud.google.com/endpoints/docs/frameworks/java/annotations ). 我认为您不能将PATCH HTTP方法与Google Cloud Endpoints一起使用,请参阅@ApiMethod Annotation的文档,其中说:“将实体作为参数的方法应该使用HttpMethod.POST(用于插入操作)或HttpMethod.PUT(以进行更新操作)”( https://cloud.google.com/endpoints/docs/frameworks/java/annotations )。
See also https://cloud.google.com/appengine/docs/java/endpoints/javadoc/com/google/api/server/spi/config/ApiMethod.HttpMethod 另请参见https://cloud.google.com/appengine/docs/java/endpoints/javadoc/com/google/api/server/spi/config/ApiMethod.HttpMethod
What you can do if you want to avoid sending a complete "Bike" resource representation (for eg use less bandwidth) is to create a specific class (annotated as an @Entity) which only has the two necessary fields. 如果要避免发送完整的“自行车”资源表示(例如,使用较少的带宽),该怎么做是创建一个只有两个必填字段的特定类(标注为@Entity)。 Let's call it BikePrice for example
例如,我们称它为BikePrice
@Entity
public class BikePrice {
@Id
protected Long id;
protected String price;
You then create a dedicated endpoints method (with a BikePrice entity as parameter) in which you load your Bike original entity through Objectify and update it 然后,您创建一个专用的终结点方法(以BikePrice实体作为参数),在其中通过Objectify加载Bike原始实体并对其进行更新。
....
httpMethod = ApiMethod.HttpMethod.PUT)
public void updateBike(BikePrice bikePrice) {
Bike b = ofy().load().type(Bike.class).id(bikePrice.getId()).now();
b.setPrice(bikePrice.getPrice());
....
Note that you never save any BikePrice entity in the Datastore. 请注意,您永远不会在数据存储区中保存任何BikePrice实体。 It is just used as a kind of "container" or "conveyor of data" between your front end and App Engine.
它只是用作前端和App Engine之间的一种“容器”或“数据传送器”。
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