Question

每个Firebase Firestore文档中，要查询数组包含某个值的集合，请执行以下操作：

citiesRef.whereField("regions", arrayContains: "west_coast")

仅当我尝试在Swift 4中编写该代码时，才会出现以下错误：

Argument labels '(_:, arrayContains:)' do not match any available overloads

查看可用的重载会产生以下内容：

Query whereField(field: String, isEqualTo: Any)
Query whereField(path: FieldPath, isEqualTo: Any)
Query whereField(field: String, isLessThan: Any)
Query whereField(path: FieldPath, isLessThan: Any)
Query whereField(field: String, isGreaterThan: Any)
Query whereField(path: FieldPath, isGreaterThan: Any)
Query whereField(field: String, isLessThanOrEqualTo: Any)
Query whereField(path: FieldPath, isLessThanOrEqualTo: Any)
Query whereField(field: String, isGreaterThanOrEqualTo: Any)
Query whereField(path: FieldPath, isGreaterThanOrEqualTo: Any)

关于数组或包含的内容不存在。文档过时了吗？我想念什么？ Docs found here

我的Podfile：

 platform :ios, '9.0'

target 'Appname' do
use_frameworks!

# Pods for Appname

pod ‘Firebase/Core’
pod ‘Firebase/Auth’
pod 'Firebase/Database'
pod 'Firebase/Firestore'
pod 'Firebase/Storage'
pod 'Firebase/Invites'
pod 'SwiftGifOrigin', '~> 1.6'
pod 'Kingfisher', '~> 4.0'
pod 'AudioKit', '~> 4.0'
pod 'KSTokenView', '~> 4.0'
pod 'ReachabilitySwift'
pod 'ZFTokenField'
pod 'SlackTextViewController'
pod 'RealmSwift'

target 'AppnameTests' do
 inherit! :search_paths
 # Pods for testing
end

target 'AppnameUITests' do
 inherit! :search_paths
 # Pods for testing
end

end

Answer 1

arrayContains支持已在Firestore pod的5.5.0中发布。确保您使用的是该版本或更高版本。 Read the release notes here.

如何查询Firestore数组中的值

1 个答案: