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WIP: documentations

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This commit is contained in:
John Rommel Estropia
2017-10-24 00:31:27 +09:00
parent e37186da73
commit b6ee0b014f
13 changed files with 444 additions and 54 deletions
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104
Sources/DataStack+Querying.swift
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@@ -109,7 +109,18 @@ extension DataStack: FetchableSource, QueryableSource {
return self.mainContext.fetchOne(from, fetchClauses)
}
// TODO: docs
/**
Fetches the first `DynamicObject` instance that satisfies the specified `FetchChainableBuilderType` built from a chain of clauses.
```
let youngestTeen = dataStack.fetchOne(
From<MyPersonEntity>()
.where(\.age > 18)
.orderBy(.ascending(\.age))
)
```
- parameter clauseChain: a `FetchChainableBuilderType` built from a chain of clauses
- returns: the first `DynamicObject` instance that satisfies the specified `FetchChainableBuilderType`
*/
public func fetchOne<B: FetchChainableBuilderType>(_ clauseChain: B) -> B.ObjectType? {
CoreStore.assert(
@@ -151,7 +162,18 @@ extension DataStack: FetchableSource, QueryableSource {
return self.mainContext.fetchAll(from, fetchClauses)
}
// TODO: docs
/**
Fetches all `DynamicObject` instances that satisfy the specified `FetchChainableBuilderType` built from a chain of clauses.
```
let people = dataStack.fetchAll(
From<MyPersonEntity>()
.where(\.age > 18)
.orderBy(.ascending(\.age))
)
```
- parameter clauseChain: a `FetchChainableBuilderType` built from a chain of clauses
- returns: all `DynamicObject` instances that satisfy the specified `FetchChainableBuilderType`
*/
public func fetchAll<B: FetchChainableBuilderType>(_ clauseChain: B) -> [B.ObjectType]? {
CoreStore.assert(
@@ -193,7 +215,18 @@ extension DataStack: FetchableSource, QueryableSource {
return self.mainContext.fetchCount(from, fetchClauses)
}
// TODO: docs
/**
Fetches the number of `DynamicObject`s that satisfy the specified `FetchChainableBuilderType` built from a chain of clauses.
```
let numberOfAdults = dataStack.fetchCount(
From<MyPersonEntity>()
.where(\.age > 18)
.orderBy(.ascending(\.age))
)
```
- parameter clauseChain: a `FetchChainableBuilderType` built from a chain of clauses
- returns: the number `DynamicObject`s that satisfy the specified `FetchChainableBuilderType`
*/
public func fetchCount<B: FetchChainableBuilderType>(_ clauseChain: B) -> Int? {
CoreStore.assert(
@@ -235,7 +268,18 @@ extension DataStack: FetchableSource, QueryableSource {
return self.mainContext.fetchObjectID(from, fetchClauses)
}
// TODO: docs
/**
Fetches the `NSManagedObjectID` for the first `DynamicObject` that satisfies the specified `FetchChainableBuilderType` built from a chain of clauses.
```
let youngestTeenID = dataStack.fetchObjectID(
From<MyPersonEntity>()
.where(\.age > 18)
.orderBy(.ascending(\.age))
)
```
- parameter clauseChain: a `FetchChainableBuilderType` built from a chain of clauses
- returns: the `NSManagedObjectID` for the first `DynamicObject` that satisfies the specified `FetchChainableBuilderType`
*/
public func fetchObjectID<B: FetchChainableBuilderType>(_ clauseChain: B) -> NSManagedObjectID? {
CoreStore.assert(
@@ -277,7 +321,18 @@ extension DataStack: FetchableSource, QueryableSource {
return self.mainContext.fetchObjectIDs(from, fetchClauses)
}
// TODO: docs
/**
Fetches the `NSManagedObjectID` for all `DynamicObject`s that satisfy the specified `FetchChainableBuilderType` built from a chain of clauses.
```
let idsOfAdults = dataStack.fetchObjectIDs(
From<MyPersonEntity>()
.where(\.age > 18)
.orderBy(.ascending(\.age))
)
```
- parameter clauseChain: a `FetchChainableBuilderType` built from a chain of clauses
- returns: the `NSManagedObjectID` for all `DynamicObject`s that satisfy the specified `FetchChainableBuilderType`
*/
public func fetchObjectIDs<B: FetchChainableBuilderType>(_ clauseChain: B) -> [NSManagedObjectID]? {
CoreStore.assert(
@@ -328,7 +383,20 @@ extension DataStack: FetchableSource, QueryableSource {
return self.mainContext.queryValue(from, selectClause, queryClauses)
}
// TODO: docs
/**
Queries a property value or aggregate as specified by the `QueryChainableBuilderType` built from a chain of clauses.
A "query" differs from a "fetch" in that it only retrieves values already stored in the persistent store. As such, values from unsaved transactions or contexts will not be incorporated in the query result.
```
let averageAdultAge = dataStack.queryValue(
From<MyPersonEntity>()
.select(Int.self, .average(\.age))
.where(\.age > 18)
)
```
- parameter clauseChain: a `QueryChainableBuilderType` indicating the property/aggregate to fetch and the series of queries for the request.
- returns: the result of the the query as specified by the `QueryChainableBuilderType`
*/
public func queryValue<B: QueryChainableBuilderType>(_ clauseChain: B) -> B.ResultType? where B.ResultType: QueryableAttributeType {
CoreStore.assert(
@@ -376,7 +444,29 @@ extension DataStack: FetchableSource, QueryableSource {
return self.mainContext.queryAttributes(from, selectClause, queryClauses)
}
// TODO: docs
/**
Queries a dictionary of attribute values or as specified by the `QueryChainableBuilderType` built from a chain of clauses.
A "query" differs from a "fetch" in that it only retrieves values already stored in the persistent store. As such, values from unsaved transactions or contexts will not be incorporated in the query result.
```
let results = dataStack.queryAttributes(
From<MyPersonEntity>()
.select(
NSDictionary.self,
.attribute(\.age, as: "age"),
.count(\.age, as: "numberOfPeople")
)
.groupBy(\.age)
)
for dictionary in results! {
let age = dictionary["age"] as! Int
let count = dictionary["numberOfPeople"] as! Int
print("There are \(count) people who are \(age) years old."
}
```
- parameter clauseChain: a `QueryChainableBuilderType` indicating the properties to fetch and the series of queries for the request.
- returns: the result of the the query as specified by the `QueryChainableBuilderType`
*/
public func queryAttributes<B: QueryChainableBuilderType>(_ clauseChain: B) -> [[String: Any]]? where B.ResultType == NSDictionary {
CoreStore.assert(