Geo Queries Demonstation

GeoQueries.m

// This code assumes that you have a class with a description property,
// an address property and a coordinates property.  To properly enable
// geo queries, makes sure to map the "description" property to _geoloc
// in your mapping function (eg, @"_geoloc", @"description" in the dictionary
// initializer).

myPlace1.description = @"2000 sq feed small company office";
myPlace1.address = @"1 Main St, Cambridge, MA";
myPlace1.coordinates = [NSArray  arrayWithObjects:
                        [NSNumber numberWithDouble:-71.083934],
                        [NSNumber numberWithDouble:42.362474], nil];


myPlace2.description = @"5000 sq feet in a commercial building";
myPlace2.address = @"1 Broadway, Cambridge, MA";
myPlace2.coordinates = [NSArray  arrayWithObjects:
                        [NSNumber numberWithDouble:-71.085438],
                        [NSNumber numberWithDouble:42.362688], nil];

myPlace3.description = @"10000 sq feet of office space”;
myPlace3.address = @"711 Atlantic Ave, Boston, MA";
myPlace3.coordinates = [NSArray  arrayWithObjects:
                        [NSNumber numberWithDouble:-71.056416],
                        [NSNumber numberWithDouble:42.351018], nil];


// The queries from the above code can be specified like so
// query={"_geoloc":{"$nearSphere":[-71,41]}}
KCSQuery *q1 = [KCSQuery queryOnField:@"coordinates"
                     usingConditional:kKCSNearSphere
                             forValue: [NSArray arrayWithObjects:
                                        [NSNumber numberWithInt:-71],
                                        [NSNumber numberWithInt:41], nil]];

// {"_geoloc":{"$nearSphere":[-71.05,42.35], "$maxDistance":"0.5"}}
KCSQuery *q2 = [KCSQuery queryOnField:@"coordinates"
                     usingConditionalsForValues:
                 kKCSNearSphere,
                 [NSArray arrayWithObjects:
                  [NSNumber numberWithFloat:-71.05],
                  [NSNumber numberWithFloat:42.35], nil],
                 kKCSMaxDistance,
                 [NSNumber numberWithFloat:0.5], nil];


//{ "$within" : { "$box" : [[-70, 44], [-72, 42]]}

NSArray *point1 = [NSArray arrayWithObjects:[NSNumber numberWithInt:-70],
                   [NSNumber numberWithInt:44], nil];

NSArray *point2 = [NSArray arrayWithObjects:[NSNumber numberWithInt:-72],
                   [NSNumber numberWithInt:42], nil];

NSArray *box = [NSArray arrayWithObjects:point1, point2, nil];
KCSQuery *q3 = [KCSQuery queryOnField:@"coordinates"
                     usingConditional:kKCSWithinBox
                             forValue:box];


// Get our places collection, assuming your class is called Places
KCSCollection *places = [KCSCollection collectionFromString:@"places"
                                                    ofClass:[Places class]];

// Fetch the first group of entities
places.query = q1;
[places fetchWithDelegate:self];

// Fetch the first group of entities
places.query = q2;
[places fetchWithDelegate:self];

// Fetch the first group of entities
places.query = q3;
[places fetchWithDelegate:self];

// Reset the query by setting it to an empty query.
places.query = [KCSQuery query];