49 lines
1.2 KiB
Swift
49 lines
1.2 KiB
Swift
//
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// TagsManager.swift
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// Database
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//
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// Created by Brent Simmons on 7/8/17.
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// Copyright © 2017 Ranchero Software. All rights reserved.
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//
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import Foundation
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import RSDatabase
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import Data
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// Article->tags is a many-to-many relationship.
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// Since a tag is just a String, the tags table and the lookup table are the same table.
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// All the heavy lifting is done in DatabaseLookupTable.
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//
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// CREATE TABLE if not EXISTS tags(tagName TEXT NOT NULL, articleID TEXT NOT NULL, PRIMARY KEY(tagName, articleID));
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// CREATE INDEX if not EXISTS tags_tagName_index on tags (tagName COLLATE NOCASE);
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final class TagsTable: DatabaseRelatedObjectsTable {
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let name: String
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let databaseIDKey = DatabaseKey.tagName
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init(name: String) {
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self.name = name
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}
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// MARK: DatabaseTable Methods
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func fetchObjectsWithIDs(_ databaseIDs: Set<String>, in database: FMDatabase) -> [DatabaseObject] {
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// A tag is a string, and it is its own databaseID.
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return databaseIDs.map{ $0 as DatabaseObject }
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}
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func objectWithRow(_ row: FMResultSet) -> DatabaseObject? {
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return nil //unused
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}
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func save(_ objects: [DatabaseObject], in database: FMDatabase) {
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// Nothing to do, since tags are saved in the lookup table, not in a separate table.
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}
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}
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