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WIP: rehaul of type-safe fetching and querying

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John Estropia
2017-03-01 19:34:07 +09:00
parent 3224fcf71d
commit 8569c3c524
9 changed files with 638 additions and 390 deletions
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4
Sources/Fetching and Querying/QueryableSource.swift
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@@ -44,7 +44,7 @@ public protocol QueryableSource: class {
- parameter queryClauses: a series of `QueryClause` instances for the query request. Accepts `Where`, `OrderBy`, `GroupBy`, and `Tweak` clauses.
- returns: the result of the the query. The type of the return value is specified by the generic type of the `Select<U>` parameter.
*/
func queryValue<T: NSManagedObject, U: SelectValueResultType>(_ from: From<T>, _ selectClause: Select<U>, _ queryClauses: QueryClause...) -> U?
func queryValue<T: NSManagedObject, U: CoreStoreQueryableAttributeType>(_ from: From<T>, _ selectClause: Select<U>, _ queryClauses: QueryClause...) -> U?
/**
Queries aggregate values as specified by the `QueryClause`s. Requires at least a `Select` clause, and optional `Where`, `OrderBy`, `GroupBy`, and `Tweak` clauses.
@@ -56,7 +56,7 @@ public protocol QueryableSource: class {
- parameter queryClauses: a series of `QueryClause` instances for the query request. Accepts `Where`, `OrderBy`, `GroupBy`, and `Tweak` clauses.
- returns: the result of the the query. The type of the return value is specified by the generic type of the `Select<U>` parameter.
*/
func queryValue<T: NSManagedObject, U: SelectValueResultType>(_ from: From<T>, _ selectClause: Select<U>, _ queryClauses: [QueryClause]) -> U?
func queryValue<T: NSManagedObject, U: CoreStoreQueryableAttributeType>(_ from: From<T>, _ selectClause: Select<U>, _ queryClauses: [QueryClause]) -> U?
/**
Queries a dictionary of attribute values as specified by the `QueryClause`s. Requires at least a `Select` clause, and optional `Where`, `OrderBy`, `GroupBy`, and `Tweak` clauses.