feat: Add support for PFQuery.containedBy

Parse/Parse/Internal/LocalDataStore/OfflineQueryLogic/PFOfflineQueryLogic.m

@@ -329,6 +329,19 @@
     return YES;
 }
 
+/**
+ Matches $containedBy constraints.
+ */
++ (BOOL)matchesValue:(NSArray *)values
+      containedBy:(NSArray *)constraints {
+    for (id value in values) {
+        if (![self matchesValue:value containedIn:constraints]) {
+            return NO;
+        }
+    }
+    return YES;
+}
+
 /**
  Matches $regex constraints.
  */
@@ -446,6 +459,8 @@
         return [self matchesValue:value notContainedIn:constraint];
     } else if ([operator isEqualToString:PFQueryKeyContainsAll]) {
         return [self matchesValue:value containsAllObjectsInArray:constraint];
+    } else if ([operator isEqualToString:PFQueryKeyContainedBy]) {
+        return [self matchesValue:value containedBy:constraint];
     } else if ([operator isEqualToString:PFQueryKeyRegex]) {
         return [self matchesValue:value regex:constraint withOptions:allKeyConstraints[PFQueryOptionKeyRegexOptions]];
     } else if ([operator isEqualToString:PFQueryOptionKeyRegexOptions]) {

Parse/Parse/Internal/Query/PFQueryConstants.h

@@ -19,6 +19,7 @@ extern NSString *const PFQueryKeyGreaterThanOrEqualTo;
 extern NSString *const PFQueryKeyContainedIn;
 extern NSString *const PFQueryKeyNotContainedIn;
 extern NSString *const PFQueryKeyContainsAll;
+extern NSString *const PFQueryKeyContainedBy;
 extern NSString *const PFQueryKeyNearSphere;
 extern NSString *const PFQueryKeyWithin;
 extern NSString *const PFQueryKeyGeoWithin;

Parse/Parse/Internal/Query/PFQueryConstants.m

@@ -17,6 +17,7 @@
 NSString *const PFQueryKeyContainedIn = @"$in";
 NSString *const PFQueryKeyNotContainedIn = @"$nin";
 NSString *const PFQueryKeyContainsAll = @"$all";
+NSString *const PFQueryKeyContainedBy = @"$containedBy";
 NSString *const PFQueryKeyNearSphere = @"$nearSphere";
 NSString *const PFQueryKeyWithin = @"$within";
 NSString *const PFQueryKeyGeoWithin = @"$geoWithin";

Parse/Parse/Source/PFQuery.h

@@ -273,6 +273,17 @@ typedef void (^PFQueryArrayResultBlock)(NSArray<PFGenericObject> *_Nullable obje
  */
 - (instancetype)whereKey:(NSString *)key containsAllObjectsInArray:(NSArray *)array;
 
+/**
+ Adds a constraint to the query that requires a particular key's value to
+ be contained by the provided list of values. Get objects where all array elements match
+
+ @param key The key to be constrained.
+ @param array The array of values to search for.
+
+ @return The same instance of `PFQuery` as the receiver. This allows method chaining.
+ */
+- (instancetype)whereKey:(NSString *)key containedBy:(NSArray *)array;
+
 ///--------------------------------------
 #pragma mark - Adding Location Constraints
 ///--------------------------------------

Parse/Parse/Source/PFQuery.m

@@ -303,6 +303,10 @@
     return [self whereKey:key condition:PFQueryKeyContainsAll object:array];
 }
 
+- (instancetype)whereKey:(NSString *)key containedBy:(NSArray *)inArray {
+    return [self whereKey:key condition:PFQueryKeyContainedBy object:inArray];
+}
+
 - (instancetype)whereKey:(NSString *)key nearGeoPoint:(PFGeoPoint *)geopoint {
     return [self whereKey:key condition:PFQueryKeyNearSphere object:geopoint];
 }

Parse/Tests/Unit/OfflineQueryLogicUnitTests.m

@@ -1097,6 +1097,42 @@ - (void)testQueryAll {
     [task waitUntilFinished];
 }
 
+- (void)testQueryContainedBy {
+    PFOfflineQueryLogic *logic = [[PFOfflineQueryLogic alloc] init];
+    PFSQLiteDatabase *database = [[PFSQLiteDatabase alloc] init];
+
+    PFObject *object = [PFObject objectWithClassName:@"Object"];
+    object[@"numbers"] = @[@0, @2];
+    object[@"letters"] = @[@"b", @"c", @"d"];
+    PFQuery *query = [PFQuery queryWithClassName:@"Object"];
+    BFTask *task = [BFTask taskWithResult:nil];
+
+    [query whereKey:@"numbers" containedBy:@[@1, @2, @3, @4]];
+    PFConstraintMatcherBlock matcherBlock = [logic createMatcherForQueryState:query.state user:_user];
+
+    // Check matcher
+    task = [[task continueWithBlock:^id(BFTask *task) {
+        return matcherBlock(object, database);
+    }] continueWithBlock:^id(BFTask *task) {
+        XCTAssertFalse([task.result boolValue]);
+        return nil;
+    }];
+
+    query = [PFQuery queryWithClassName:@"Object"];
+    [query whereKey:@"letters" containedBy:@[@"a", @"b", @"c", @"d", @"e"]];
+    matcherBlock = [logic createMatcherForQueryState:query.state user:_user];
+
+    // Check matcher
+    task = [[task continueWithBlock:^id(BFTask *task) {
+        return matcherBlock(object, database);
+    }] continueWithBlock:^id(BFTask *task) {
+        XCTAssertTrue([task.result boolValue]);
+        return nil;
+    }];
+
+    [task waitUntilFinished];
+}
+
 - (void)testQueryRegex {
     PFOfflineQueryLogic *logic = [[PFOfflineQueryLogic alloc] init];
     PFSQLiteDatabase *database = [[PFSQLiteDatabase alloc] init];

Parse/Tests/Unit/QueryUnitTests.m

@@ -426,6 +426,12 @@ - (void)testWhereContainsAllObjectsInArray {
     XCTAssertEqualObjects(query.state.conditions, @{ @"yolo" : @{@"$all" : @[ @"yarr" ]} });
 }
 
+- (void)testWhereContainedBy {
+    PFQuery *query = [PFQuery queryWithClassName:@"a"];
+    [query whereKey:@"yolo" containedBy:@[ @"yarr" ]];
+    XCTAssertEqualObjects(query.state.conditions, @{ @"yolo" : @{@"$containedBy" : @[ @"yarr" ]} });
+}
+
 - (void)testWhereKeyNearGeoPoint {
     PFGeoPoint *geoPoint = [PFGeoPoint geoPointWithLatitude:10.0 longitude:20.0];