考虑一类SyncObject
是KVC-符合如属性:time
,someValue
,lastChange
,uuid
。
考虑NSArray
仅包含一个实例SyncObject
。
需要将数组作为JSON数组提交给服务器。
如何使用使用RestKit的HTTP POST将这个数组提交给服务器?
示例数组:
[
{
"time": "14:45 10/21/2011",
"someValue": "15",
"lastChange": "14:45 10/21/2011",
"uuid": "0b07c510-f4c8-11e0-be50-0800200c9a66"
},
{
"time": "14:50 10/21/2011",
"someValue": "62",
"lastChange": "14:51 10/21/2011",
"uuid": "1a6d4480-f4c8-11e0-be50-0800200c9a66"
}
]
有一个需要作为JSON服务器的对象数组,RestKit可能是最简单的方法:我试图避免将对象转换为一组NSDictionary
对象,然后使用一些JSON编码器来获取我可以POST
访问服务器的JSON 。
所以,创建了数组,并为数组中存储的对象类设置了映射后,我自然会尝试访问POST
服务器。
RKObjectManager* mgr = [RKObjectManager objectManagerWithBaseURL:@"http://localhost/someweb/api/"];
mgr.serializationMIMEType = RKMIMETypeFormURLEncoded;
mgr.client.username = @"username";
mgr.client.password = @"password";
RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[NSMutableDictionary class]];
[mapping mapKeyPath: @"time" toAttribute:@"time" ];
[mapping mapKeyPath: @"someValue" toAttribute:@"someValue" ];
[mapping mapKeyPath: @"lastChange" toAttribute:@"lastChange" ];
[mapping mapKeyPath: @"uuid" toAttribute:@"uuid" ];
RKObjectMapping* mappingForSerialization = [mapping inverseMapping];
[mgr.mappingProvider setSerializationMapping:mappingForSerialization
forClass:[NSManagedObject class]];
[mgr.router routeClass:[NSManagedObject class] toResourcePath:@"/sync" forMethod:RKRequestMethodPOST];
[mgr postObject:array delegate:nil/*self*/];
但是,这是我得到的结果:
AppConnect[1974:6e0b] *** Terminating app due to uncaught exception '(null)', reason: 'Unable to find a routable path for object of type '__NSArrayI' for HTTP Method 'POST'
显然,RestKit不知道如何处理NSArray
s。
如何使用RestKit发布对象数组?
我用手动发送替换了最后一行RKObjectLoader
。
//[mgr postObject:[NSMutableDictionary dictionaryWithObject:array forKey:@"data"] delegate:nil/*self*/];
NSString* syncPath = @"/sync";
RKObjectLoader * objectLoader = [mgr objectLoaderWithResourcePath:syncPath delegate:self];
objectLoader.serializationMIMEType = RKMIMETypeJSON;
objectLoader.method = RKRequestMethodPOST;
//objectLoader.objectClass = [NSManagedObject class];
//objectLoader.managedObjectStore = mgr.objectStore;
objectLoader.params = [NSDictionary dictionaryWithObject:array
forKey:@"MyData"];
[objectLoader send];
这不适用于任何类型的映射,而是传输一组对象的描述。设置serializationMIMEType
也不会影响传输内容的结构,并且params
始终以传输方式传输application/x-www-form-urlencoded
。
分配序列化映射和传递对象targetObject
和sourceObject
(这似乎是RestKit内部做的-[RKObjectManager postObject:delegate:]
)。
RKObjectLoader * objectLoader = [mgr objectLoaderWithResourcePath:syncPath delegate:self];
objectLoader.method = RKRequestMethodPOST;
//objectLoader.objectClass = [NSManagedObject class];
//objectLoader.managedObjectStore = mgr.objectStore;
objectLoader.params = [NSMutableDictionary dictionaryWithObject:array
forKey:@"MyData"];
objectLoader.serializationMapping = mapping;
objectLoader.serializationMIMEType = RKMIMETypeJSON;
objectLoader.sourceObject = objectLoader.params;
objectLoader.targetObject = objectLoader.params;
[objectLoader send];
但这种方式没有映射:
2011-10-12 12:36:48.143 MyProject[5119:207] D restkit.network:RKObjectLoader.m:290 POST or PUT request for source object {
MyData = (
"<NSManagedObject: 0x5935430> (entity: SomeRecord; id: 0x5934da0 <x-coredata://64DF9977-DA50-4FCD-8C20-4132E58439BF/SomeRecord/p1> ; data: <fault>)",
"<NSManagedObject: 0x5935730> (entity: SomeRecord; id: 0x5934db0 <x-coredata://64DF9977-DA50-4FCD-8C20-4132E58439BF/SomeRecord/p2> ; data: <fault>)"
);
}, serializing to MIME Type application/json for transport...
2011-10-12 12:36:48.143 MyProject[5119:207] D restkit.object_mapping:RKObjectMappingOperation.m:428 Starting mapping operation...
2011-10-12 12:36:48.145 MyProject[5119:207] T restkit.object_mapping:RKObjectMappingOperation.m:291 Did not find mappable attribute value keyPath 'time'
2011-10-12 12:36:48.145 MyProject[5119:207] T restkit.object_mapping:RKObjectMappingOperation.m:291 Did not find mappable attribute value keyPath 'someValue'
2011-10-12 12:36:48.145 MyProject[5119:207] T restkit.object_mapping:RKObjectMappingOperation.m:291 Did not find mappable attribute value keyPath 'lastChange'
2011-10-12 12:36:48.145 MyProject[5119:207] T restkit.object_mapping:RKObjectMappingOperation.m:291 Did not find mappable attribute value keyPath 'uuid'
2011-10-12 12:36:48.145 MyProject[5119:207] D restkit.object_mapping:RKObjectMappingOperation.m:448 Mapping operation did not find any mappable content
2011-10-12 12:36:48.146 MyProject[5119:207] T restkit.network:RKRequest.m:211 Prepared POST URLRequest '<NSMutableURLRequest http://someurl/api/sync?request=provide_key>'. HTTP Headers: {
Accept = "application/json";
"Content-Length" = 0;
}. HTTP Body: .
发布于 2018-04-03 08:50:36
restkit没有提供NSArray的可路由路径,因为为NSManagedObject
类定义了路由。可能想要创建一个自定义类,比如说MySyncEntity
可以在映射中定义你定义的ivars。然后,创建映射像这样:
RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[MySyncEntity class]];
....
[myManager setSerializationMIMEType:RKMIMETypeJSON];
[[myManager router] routeClass:[MySyncEntity class] toResourcePath:@"/sync"];
那么应该能够将对象作为JSON对象发布到API后端。
在这种情况下,我们希望将一组NSManagedObject
实例发布到基于JSON的API中。要做到这一点,我们需要创建一个同步实体,它将数组中的对象保存起来:
@interface MySyncEntity : NSObject {}
@property (nonatomic, retain) NSArray* mySyncArray;
...
@end
该mySyncArray
会举行,我们想提交其他后端的有效载荷。然后,我们为NSManagedObject
将要发送mySyncArray
的MySyncEntity
实体和实体本身创建适当的映射。
RKObjectManager *manager = [RKObjectManager objectManagerWithBaseURL:kBaseUrl];
...
RKObjectMapping *mngObjMapping = [RKObjectMapping mappingForClass:[NSManagedObject class]];
[mngObjMapping mapKeyPath: @"time" toAttribute:@"time"];
[mngObjMapping mapKeyPath: @"recordLevel" toAttribute:@"recordLevel"];
.... //map as many properties as you wish
[[manager mappingProvider] setSerializationMapping:[mngObjMapping inverseMapping]
forClass:[NSManagedObject class]];
//now, we create mapping for the MySyncEntity
RKObjectMapping *syncEntityMapping = [RKObjectMapping mappingForClass:[MySyncEntity class]];
[syncEntityMapping mapKeyPath:@"mySyncArray" toRelationship:@"mySyncArray" withMapping:mngObjMapping];
[[manager mappingProvider] setSerializationMapping:[syncEntityMapping inverseMapping]
forClass:[MySyncEntity class]];
现在通过定义的映射,我们可以将对象发布到服务器
[manager postObject:mySyncInstance delegate:nil];
mySyncInstance
数组的内容将根据mngObjMapping
并映射到已定义的休息端点进行映射。
发布于 2018-04-03 10:00:32
[syncEntityMapping mapKeyPath:@"mySyncArray" toRelationship:@"mySyncArray" withMapping:mngObjMapping];
这就是说“ mySyncArray
keypath是一个包含应该按照映射的对象的数组mngObjMapping
”。
https://stackoverflow.com/questions/-100007928
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