Add support for generic one to many relationships

Author: RafaelKayumov

Classes/JSONAPIResourceParser.m

@@ -112,7 +112,7 @@ + (NSDictionary*)dictionaryFor:(NSObject <JSONAPIResource>*)resource {
                 if (valueArray.count > 0) {
                     NSMutableArray *dictionaryArray = [[NSMutableArray alloc] initWithCapacity:valueArray.count];
 
-                    if ([property resourceType]) {
+                    if ([property resourceType] || [((NSArray *)value).firstObject conformsToProtocol:@protocol(JSONAPIResource)]) {
                         if (linkage == nil) {
                             linkage = [[NSMutableDictionary alloc] init];
                         }
@@ -279,10 +279,9 @@ + (void)link:(NSObject <JSONAPIResource>*)resource withIncluded:(JSONAPI*)jsonAP
         Class valueClass = nil;
         if (propertyDescriptor.resourceType) {
             valueClass = propertyDescriptor.resourceType;
-        } else if ([value conformsToProtocol:@protocol(JSONAPIResource)]) {
+        } else if ([value conformsToProtocol:@protocol(JSONAPIResource)] || [value isKindOfClass:[NSArray class]]) {
             valueClass = [value class];
         }
-        id includedValue = included[[[valueClass descriptor] type]];
 
         // ordinary attribute
         if (valueClass == nil) {
@@ -291,20 +290,30 @@ + (void)link:(NSObject <JSONAPIResource>*)resource withIncluded:(JSONAPI*)jsonAP
         } else if ([value isKindOfClass:[NSArray class]]) {
             NSMutableArray *matched = [value mutableCopy];
             [value enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
-                NSObject <JSONAPIResource> *res = obj;
-                id v = includedValue[res.ID];
-                if (v != nil) {
-                    matched[idx] = v;
+                if ([obj conformsToProtocol:@protocol(JSONAPIResource)]) {
+                    NSObject <JSONAPIResource> *res = obj;
+                    id includedValue = included[[[res.class descriptor] type]];
+                    if (includedValue) {
+                        id v = includedValue[res.ID];
+                        if (v != nil) {
+                            matched[idx] = v;
+                        }
+                    }
                 }
             }];
 
             [resource setValue:matched forKey:key];
         // has one
         } else if (value != nil) {
-            NSObject <JSONAPIResource> *res = value;
-            id v = includedValue[res.ID];
-            if (v != nil) {
-                [resource setValue:v forKey:key];
+            if ([value conformsToProtocol:@protocol(JSONAPIResource)]) {
+                id <JSONAPIResource> res = value;
+                id includedValue = included[[[res.class descriptor] type]];
+                if (includedValue) {
+                    id v = included[[[res.class descriptor] type]][res.ID];
+                    if (v != nil) {
+                        [resource setValue:v forKey:key];
+                    }
+                }
             }
         }
     }