objective-c – RestKit使用setObjectMapping从核心数据中删除旧数据

我已经在 RestKit Object Mapping: difficulty using setObjectMapping:forResourcePathPattern:withFetchRequestBlock审查了答案,它正在工作,但只适用于最后的映射.例：

RKManagedObjectMapping *audioSourcesMapping = [RKManagedObjectMapping mappingForEntityWithName:kEntityAudioSources inManagedObjectStore:objectStore];
[audioSourcesMapping mapKeyPath:@"icon" toAttribute:@"icon"];
[audioSourcesMapping mapKeyPath:@"name" toAttribute:@"name"];
[audioSourcesMapping mapKeyPath:@"notes" toAttribute:@"notes"];
[audioSourcesMapping mapKeyPath:@"section" toAttribute:@"section"];
[audioSourcesMapping mapKeyPath:@"url" toAttribute:@"url"];
audioSourcesMapping.primaryKeyAttribute = @"name";
[wsiObjectManager.mappingProvider registerMapping:audioSourcesMapping withRootKeyPath:@"winSystem.winSystemAudioSources.winSystemAudioSource"];


[wsiObjectManager.mappingProvider setObjectMapping:audioSourcesMapping forResourcePathPattern:kWinSystemInfoXml 
                             withFetchRequestBlock:^NSFetchRequest *(NSString *resourcePath) {
                                 return [AudioSources fetchRequest];
                             }];


RKManagedObjectMapping *eventsMapping = [RKManagedObjectMapping mappingForEntityWithName:kEntityEvents inManagedObjectStore:objectStore];
[eventsMapping mapKeyPath:@"contact" toAttribute:@"contact"];
[eventsMapping mapKeyPath:@"startDate" toAttribute:@"startDate"];
[eventsMapping mapKeyPath:@"endDate" toAttribute:@"endDate"];
[eventsMapping mapKeyPath:@"icon" toAttribute:@"icon"];
[eventsMapping mapKeyPath:@"location" toAttribute:@"location"];
[eventsMapping mapKeyPath:@"name" toAttribute:@"name"];
[eventsMapping mapKeyPath:@"notes" toAttribute:@"notes"];
[eventsMapping mapKeyPath:@"section" toAttribute:@"section"];
[eventsMapping mapKeyPath:@"url" toAttribute:@"url"];
eventsMapping.primaryKeyAttribute = @"name";
[wsiObjectManager.mappingProvider registerMapping:eventsMapping withRootKeyPath:@"winSystem.winSystemEvents.winSystemEvent"];    


[wsiObjectManager.mappingProvider setObjectMapping:eventsMapping forResourcePathPattern:kWinSystemInfoXml 
                             withFetchRequestBlock:^NSFetchRequest *(NSString *resourcePath) {
                                 return [Events fetchRequest];
                             }];

所有的映射都很好.当源xml被更新时,将创建新的记录.当我删除一个事件时,它被删除.当我删除一个AudioSource它不会被删除.

如果我删除第二个setObjectMapping：forResourcePathPattern：withFetchRequestBlock,那么AudioSource被正确删除,但删除的事件不是.我在这个xml文件中有4个映射.

就像最后一次调用setObjectMapping：forResourcePathPattern：withFetchRequestBlock获胜.

我的解决方法是使用setObjectMapping：forResourcePathPattern：withFetchRequestBlock对最常更改的映射(在本例中为事件),并添加一个无效缓存,清空数据库和更新的按钮.必须有一些简单的东西我失踪了.

Xcode：4.3.3
RestKit：0.10.1

示例xml文件.这一切都很好,但只能从核心数据中删除使用最后一个setObjectMapping的映射：forResourcePathPattern：withFetchRequestBlock

<?xml version="1.0" encoding="UTF-8"?>
    <winSystem>
        <winSystemAudioSources>
            <winSystemAudioSource
                icon="audio.png"
                name="Hub Audio"
                notes="Cleaner Sound. Audio is delayed by about 30 seconds. This is a great way to see if you are making into the WIN System."
                section=" WIN System"
                url="http://stream.winsystem.org:443/2560.mp3" />
        </winSystemAudioSources>
        <winSystemEvents>
            <winSystemEvent
                contact=""
                endDate=""
                icon="net.png"
                location="WIN System reflector 9100"
                name="Insomniac Trivia Net"
                notes="Every Night @ 23:00 PT - WIN System reflector 9100. Join the Yahoo! group: http://groups.yahoo.com/group/insomniac-net/join"
                section="Ham Nets"
                startDate=""
                url="http://www.thedeanfamily.com/WinSystem/InsomniacNet.htm" />
        </winSystemEvents>
        <winSystemLinks>
            <winSystemLink
                icon="winsystem.png"
                name=" WIN System Home Page"
                notes="The WIN System Home Page"
                section=" WIN System"
                type="web"
                url="http://www.winsystem.org/" />
        </winSystemLinks>
        <winSystemRepeaters>
            <winSystemRepeater
                callSign="K6JSI"
                freqOffsetPl="448.800* (-) 100.0"
                grouping="winsystem"
                latitudeDefault=""
                locationElevation="Shorty's house,560' + 53'"
                longitudeDefault=""
                node="A 01330"
                repeaterId="1"
                serviceArea="Vista"
                serviceState="CA" />
        </winSystemRepeaters>
    </winSystem>

解决方法

我以前没有使用过管理对象,但是首先要做的是激活对象映射,网络请求和核心数据的restkit日志,以便您可以检查从服务器获取的是什么是restkit,映射如何工作,以及如何从CD获取东西,所以请尝试以下操作：

//This can be added in your app delegate
RKLogConfigureByName("RestKit/Network",RKLogLevelTrace);
RKLogConfigureByName("RestKit/ObjectMapping",RKLogLevelTrace);
RKLogConfigureByName("RestKit/CoreData",RKLogLevelTrace);

看看你的代码,你在这里使用相同的路径两个映射：

// forResourcePathPattern:kWinSystemInfoXml
[wsiObjectManager.mappingProvider setObjectMapping:audioSourcesMapping forResourcePathPattern:kWinSystemInfoXml 
                         withFetchRequestBlock:^NSFetchRequest *(NSString *resourcePath) {
                             return [AudioSources fetchRequest];
                         }];

// forResourcePathPattern:kWinSystemInfoXml
[wsiObjectManager.mappingProvider setObjectMapping:eventsMapping forResourcePathPattern:kWinSystemInfoXml 
                         withFetchRequestBlock:^NSFetchRequest *(NSString *resourcePath) {
                             return [Events fetchRequest];
                         }];

我认为这可能导致冲突,因为RK选择两个资源之一映射到该路径,因此您应该：

>调试核心数据在做什么？
>尝试使用关键路径方法的映射而不是资源路径模式,所以RK不会搞砸,你需要定义不同的方法来映射每种对象,现在我认为第一个被覆盖.

如果这不起作用,你应该发布你如何删除代码中的东西,也许发布你的视图控制器的所有代码.可能发生的是,呼叫被您的代码覆盖在某处.你使用块吗？

希望有帮助！

objective-c – RestKit使用setObjectMapping从核心数据中删除旧数据

解决方法

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