ios - Restkit 资源映射取决于参数

Question

我打算使用 RetKit，但文档可能会更好。

如何根据请求参数为资源注册映射？不幸的是，我没有编写好的服务可以使用，所以我所有的资源都在里面，somexamplepath.com/api/但询问一个是通过参数完成的，比如： somexamplepath.com/api/?res=people或somexamplepath.com/api/?res=machines

针对这种情况进行映射的最佳方法是什么？

Answer 1

这种情况没有很好地涵盖，因为 RestKit 匹配的是 URL 路径，而不是查询参数。

您可以使用多个实例，RKObjectManager其中每个实例将用于 API 内容的特定子集。

我还没有尝试过，但可以设置一个 2 阶段过程，其中 URL 路径用于最初匹配并将您带到RKDynamicMapping. 在动态映射中，您可以使用RKObjectMappingMatcherwhich 访问基于谓词的匹配，使用matcherWithPredicate:objectMapping:. 如果该@metadata.URL键对谓词可用，则可以匹配那里的所有查询参数。

Answer 2

您正在谈论具有不同查询字符串的相同资源。发送请求时只需添加查询字符串参数..即

NSDictionary *params = @{@"res":@"people"};
[[RKObjectManager sharedManager] getObjectsAtPath:@"api/" 
                                       parameters:params
                                          success:^(RKObjectRequestOperation *operation,
                                                    RKMappingResult *mappingResult) {
     // blah blah

---

这是我自己的代码中更全面的示例..我完全理解整个“文档可能会更好”..注意我有两个实体映射（用于两个不同的实体）..事件和与会者：

// Configure the object manager
_objectManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:@"http://mydomain.com/api/v1"]];
_objectManager.managedObjectStore = _managedObjectStore;

[RKObjectManager setSharedManager:_objectManager];

_objectManager.requestSerializationMIMEType=RKMIMETypeJSON;

RKEntityMapping *eventEntityMapping = [RKEntityMapping mappingForEntityForName:@"Event" inManagedObjectStore:_managedObjectStore];
[eventEntityMapping addAttributeMappingsFromDictionary:@{
                                                    @"id":             @"id",
                                                    @"resource_uri":   @"resource_uri",
                                                    @"title":          @"title",
                                                    @"city":           @"city",
                                                    @"from_date":      @"from_date",
                                                    @"user":           @"user_id"}];

eventEntityMapping.identificationAttributes = @[ @"id" ];



RKResponseDescriptor *eventResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:eventEntityMapping pathPattern:@"event/" keyPath:@"objects" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];

[_objectManager addResponseDescriptor:eventResponseDescriptor];

RKEntityMapping *attendeeEntityMapping = [RKEntityMapping mappingForEntityForName:@"Attendee" inManagedObjectStore:_managedObjectStore];
[attendeeEntityMapping addAttributeMappingsFromDictionary:@{
                                               @"id":                     @"id",
                                               @"order.first_name":       @"first_name",
                                               @"order.last_name":        @"last_name",
                                               @"unique":        @"order_ticket_unique_code",
                                               @"ticket.event":           @"event_id",
                                               @"ticket.description":     @"ticket_description",
                                               @"ticket.perk":            @"ticket_perk",
                                               @"ticket.price":           @"ticket_price"}];

attendeeEntityMapping.identificationAttributes = @[ @"id" ];



RKResponseDescriptor *attendeeResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:attendeeEntityMapping pathPattern:@"orderticket/search/" keyPath:@"objects" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
_objectManager.requestSerializationMIMEType=RKMIMETypeJSON;

[_objectManager addResponseDescriptor:attendeeResponseDescriptor];

稍后我只是获取一个与会者资源（在 api 中它被称为 orderticket .. 不管）

- (void)downloadAttendees
{

    NSDictionary *params = @{@"q":_eventId};
    [[RKObjectManager sharedManager] getObjectsAtPath:@"orderticket/search/" parameters:params success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
        [self.tableView reloadData];
        [self.refreshControl endRefreshing];
    } failure:^(RKObjectRequestOperation *operation, NSError *error) {
        [self.refreshControl endRefreshing];
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"An Error Has Occurred" message:[error localizedDescription] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alertView show];
    }];
}

我还获取了一个事件资源（事件资源不接受查询字符串）：

- (void)downloadEvents
{
    [[RKObjectManager sharedManager] getObjectsAtPath:@"event/" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
        [self.tableView reloadData];
        [self.refreshControl endRefreshing];
    } failure:^(RKObjectRequestOperation *operation, NSError *error) {
        [self.refreshControl endRefreshing];
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"An Error Has Occurred" message:[error localizedDescription] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alertView show];
    }];
}