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WIP: documentations

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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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39
Sources/QueryableSource.swift
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@@ -58,7 +58,20 @@ public protocol QueryableSource: class {
*/
func queryValue<D, U: QueryableAttributeType>(_ from: From<D>, _ selectClause: Select<D, U>, _ queryClauses: [QueryClause]) -> U?
// 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`
*/
func queryValue<B: QueryChainableBuilderType>(_ clauseChain: B) -> B.ResultType? where B.ResultType: QueryableAttributeType
/**
@@ -85,7 +98,29 @@ public protocol QueryableSource: class {
*/
func queryAttributes<D>(_ from: From<D>, _ selectClause: Select<D, NSDictionary>, _ queryClauses: [QueryClause]) -> [[String: Any]]?
// 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 = source.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`
*/
func queryAttributes<B: QueryChainableBuilderType>(_ clauseChain: B) -> [[String: Any]]? where B.ResultType == NSDictionary
/**