Get Specific Key-Values¶

Description¶

This operation retrieves specific key-value pairs from a map.

Method¶

Objective-CSwift

[[[Backendless.shared hive:(NSString *)hiveName] mapStore:(NSString *)keyName] getWithKeys:(NSArray<NSString *> *)keys responseHandler:^(NSDictionary<NSString *,id> *)responseHandler errorHandler:^(Fault *)errorHandler];

Backendless.shared.hive(hiveName: String).mapStore(keyName: String).get(keys: [String], responseHandler: (([String : Any]) -> Void)!, errorHandler: ((Fault) -> Void)!)

where:

Argument	Description
`hiveName`	Name of a hive where the operation is performed. String value.
`keyName`	Key name identifying a map. String value.
`keys`	An array of string values, where each value represents a key name identifying a key-value pair.

Return Value¶

An object containing key-value pairs retrieved from the map. Returns an empty object if the specified keys do not exist.

Example¶

The example below retrieves key-value pairs specified by key names: "Oranges" and "Apples" from the "fruits" map.

Objective-CSwift

[[[Backendless.shared hive:@"groceryStore"] mapStore:@"fruits"] getWithKeys:@[@"Oranges", @"Apples"] responseHandler:^(NSDictionary *response) {
    // handle response
} errorHandler:^(Fault *fault) {
    // handle error
}];

Backendless.shared.hive("groceryStore").mapStore("fruits").get(keys: ["Oranges", "Apples"], responseHandler: { response in
    // handle response
}, errorHandler: { fault in
    // handle error
})

where:

Argument	Description
`"groceryStore"`	Name of a hive where the operation is performed.
`"fruits"`	Key name identifying a map.

Response Example

{  
    "Oranges": 0.99,  
    "Apples": 1.19  
}

Codeless Reference¶

map_api_get_specific_key_values

where:

Argument	Description
`hive name`	Name of a hive where the operation is performed.
`key name`	Key name identifying a map.
`object keys`	A list of key names identifying key-value pairs.

Returns an object containing key-value pairs retrieved from the map.

Consider the following Map storage:
map_apI_example_map_store

The example below retrieves two key-value pairs for the "Oranges" and "Apples" keys from the "fruits" map.

map_api_example_get_specific_key_values

The logic produces the following output:

get-specific-key-values-result