Filter by date component in Realm
Hi i want to filter results by year number in realm, I did something but its return type is LazyFilterCollection<>. How can i fix it to get Results? I think it could be done using NSPredicate, but I can't understand how to use date component in predicates.
Here is my Training model.
class Training: Object {
@objc dynamic var id = 0
@objc dynamic var date = NSDate()
var exercises = RealmSwift.List<TrainingExercise>()
convenience init(date: NSDate, exercise: TrainingExercise) {
self.init()
self.exercises.append(exercise)
}
override class func primaryKey() -> String? {
return "id"
}
}
And here is expression where i'm trying to filter it.
let trainingsFilteredByYear = trainings.filter {
return Calendar.current.component(.year, from: $0.date as Date) == 2018
}
swift date filter realm predicate
asked Nov 20 '18 at 9:13
Michał LewczukMichał Lewczuk
226
add a comment |
Hi i want to filter results by year number in realm, I did something but its return type is LazyFilterCollection<>. How can i fix it to get Results? I think it could be done using NSPredicate, but I can't understand how to use date component in predicates.
Here is my Training model.
class Training: Object {
@objc dynamic var id = 0
@objc dynamic var date = NSDate()
var exercises = RealmSwift.List<TrainingExercise>()
convenience init(date: NSDate, exercise: TrainingExercise) {
self.init()
self.exercises.append(exercise)
}
override class func primaryKey() -> String? {
return "id"
}
}
And here is expression where i'm trying to filter it.
let trainingsFilteredByYear = trainings.filter {
return Calendar.current.component(.year, from: $0.date as Date) == 2018
}
swift date filter realm predicate
asked Nov 20 '18 at 9:13
Michał LewczukMichał Lewczuk
226
add a comment |
Hi i want to filter results by year number in realm, I did something but its return type is LazyFilterCollection<>. How can i fix it to get Results? I think it could be done using NSPredicate, but I can't understand how to use date component in predicates.
Here is my Training model.
class Training: Object {
@objc dynamic var id = 0
@objc dynamic var date = NSDate()
var exercises = RealmSwift.List<TrainingExercise>()
convenience init(date: NSDate, exercise: TrainingExercise) {
self.init()
self.exercises.append(exercise)
}
override class func primaryKey() -> String? {
return "id"
}
}
And here is expression where i'm trying to filter it.
let trainingsFilteredByYear = trainings.filter {
return Calendar.current.component(.year, from: $0.date as Date) == 2018
}
swift date filter realm predicate
asked Nov 20 '18 at 9:13
Michał LewczukMichał Lewczuk
226
Hi i want to filter results by year number in realm, I did something but its return type is LazyFilterCollection<>. How can i fix it to get Results? I think it could be done using NSPredicate, but I can't understand how to use date component in predicates.
Here is my Training model.
class Training: Object {
@objc dynamic var id = 0
@objc dynamic var date = NSDate()
var exercises = RealmSwift.List<TrainingExercise>()
convenience init(date: NSDate, exercise: TrainingExercise) {
self.init()
self.exercises.append(exercise)
}
override class func primaryKey() -> String? {
return "id"
}
}
And here is expression where i'm trying to filter it.
let trainingsFilteredByYear = trainings.filter {
return Calendar.current.component(.year, from: $0.date as Date) == 2018
}
swift date filter realm predicate
swift date filter realm predicate
asked Nov 20 '18 at 9:13
Michał LewczukMichał Lewczuk
226
asked Nov 20 '18 at 9:13
Michał LewczukMichał Lewczuk
226
edited Nov 20 '18 at 12:09
Michał Lewczuk
asked Nov 20 '18 at 9:13
Michał LewczukMichał Lewczuk
226
asked Nov 20 '18 at 9:13
Michał LewczukMichał Lewczuk
226
asked Nov 20 '18 at 9:13
Michał LewczukMichał Lewczuk
226
226
add a comment |
add a comment |
1 Answer
1
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Unfortunately it's not that simple. Results.filter takes nspredicate or a predicate format string.
let trainingsBetweenDates = realm.objects(Trainings.self).filter("date BETWEEN {%@, %@}", startDate, endDate)
you can make the boundary dates yourself using the methods described here:How do you create a swift Date object
answered Nov 20 '18 at 18:13
Harry NetzerHarry Netzer
1441114
Thanks, I'll try it
– Michał Lewczuk
Nov 20 '18 at 21:13
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Unfortunately it's not that simple. Results.filter takes nspredicate or a predicate format string.
let trainingsBetweenDates = realm.objects(Trainings.self).filter("date BETWEEN {%@, %@}", startDate, endDate)
you can make the boundary dates yourself using the methods described here:How do you create a swift Date object
answered Nov 20 '18 at 18:13
Harry NetzerHarry Netzer
1441114
Thanks, I'll try it
– Michał Lewczuk
Nov 20 '18 at 21:13
add a comment |
Unfortunately it's not that simple. Results.filter takes nspredicate or a predicate format string.
let trainingsBetweenDates = realm.objects(Trainings.self).filter("date BETWEEN {%@, %@}", startDate, endDate)
you can make the boundary dates yourself using the methods described here:How do you create a swift Date object
answered Nov 20 '18 at 18:13
Harry NetzerHarry Netzer
1441114
Thanks, I'll try it
– Michał Lewczuk
Nov 20 '18 at 21:13
add a comment |
Unfortunately it's not that simple. Results.filter takes nspredicate or a predicate format string.
let trainingsBetweenDates = realm.objects(Trainings.self).filter("date BETWEEN {%@, %@}", startDate, endDate)
you can make the boundary dates yourself using the methods described here:How do you create a swift Date object
answered Nov 20 '18 at 18:13
Harry NetzerHarry Netzer
1441114
Unfortunately it's not that simple. Results.filter takes nspredicate or a predicate format string.
let trainingsBetweenDates = realm.objects(Trainings.self).filter("date BETWEEN {%@, %@}", startDate, endDate)
you can make the boundary dates yourself using the methods described here:How do you create a swift Date object
answered Nov 20 '18 at 18:13
Harry NetzerHarry Netzer
1441114
answered Nov 20 '18 at 18:13
Harry NetzerHarry Netzer
1441114
answered Nov 20 '18 at 18:13
Harry NetzerHarry Netzer
1441114
answered Nov 20 '18 at 18:13
Harry NetzerHarry Netzer
1441114
1441114
Thanks, I'll try it
– Michał Lewczuk
Nov 20 '18 at 21:13
add a comment |
Thanks, I'll try it
– Michał Lewczuk
Nov 20 '18 at 21:13
Thanks, I'll try it
– Michał Lewczuk
Nov 20 '18 at 21:13
Thanks, I'll try it
– Michał Lewczuk
Nov 20 '18 at 21:13
add a comment |
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