db: improve genre and tag handling

src/lib/db/import-amq.ts

@@ -28,11 +28,13 @@ import {
 	artistAltNamesTable,
 	artistGroupsTable,
 	artistsTable,
+	genresTable,
 	groupAltNamesTable,
 	groupArtistMembersTable,
 	groupGroupMembersTable,
 	groupsTable,
 	songsTable,
+	tagsTable,
 } from "./schema";
 
 /**
@@ -428,11 +430,18 @@ export async function importAmqData(
 
 				// genres
 				if (a.genres.length) {
+					// Ensure lookup rows exist (string PK)
+					db.insert(genresTable)
+						.values(a.genres.map((g) => ({ name: g })))
+						.onConflictDoNothing()
+						.run();
+
+					// Insert relations
 					db.insert(animeGenresTable)
 						.values(
 							a.genres.map((g) => ({
 								annId: a.annId,
-								genre: g,
+								genreName: g,
 							})),
 						)
 						.run();
@@ -440,11 +449,18 @@ export async function importAmqData(
 
 				// tags
 				if (a.tags.length) {
+					// Ensure lookup rows exist (string PK)
+					db.insert(tagsTable)
+						.values(a.tags.map((t) => ({ name: t })))
+						.onConflictDoNothing()
+						.run();
+
+					// Insert relations
 					db.insert(animeTagsTable)
 						.values(
 							a.tags.map((t) => ({
 								annId: a.annId,
-								tag: t,
+								tagName: t,
 							})),
 						)
 						.run();

src/lib/db/schema/index.ts

@@ -59,9 +59,9 @@ export const animeTable = sqliteTable(
 		insertCount: integer("insert_count").notNull(),
 	},
 	(t) => ({
-		aniListIndex: uniqueIndex("anime_anilist_id_uq").on(t.aniListId),
-		malIndex: uniqueIndex("anime_mal_id_uq").on(t.malId),
-		kitsuIndex: uniqueIndex("anime_kitsu_id_uq").on(t.kitsuId),
+		aniListIndex: index("anime_anilist_id_uq").on(t.aniListId),
+		malIndex: index("anime_mal_id_uq").on(t.malId),
+		kitsuIndex: index("anime_kitsu_id_uq").on(t.kitsuId),
 	}),
 );
 
@@ -279,38 +279,65 @@ export const animeNamesTable = sqliteTable(
 	}),
 );
 
+export const genresTable = sqliteTable(
+	"genres",
+	{
+		/** Primary key is the genre string itself */
+		name: text("name").notNull().primaryKey(),
+	},
+	(t) => ({
+		nameIndex: index("genres_name_idx").on(t.name),
+	}),
+);
+
 export const animeGenresTable = sqliteTable(
 	"anime_genres",
 	{
-		id: integer("id").notNull().primaryKey({ autoIncrement: true }),
 		annId: integer("ann_id")
 			.notNull()
 			.references(() => animeTable.annId, { onDelete: "cascade" }),
-		genre: text("genre").notNull(),
+		genreName: text("genre_name")
+			.notNull()
+			.references(() => genresTable.name, { onDelete: "cascade" }),
 	},
 	(t) => ({
+		pk: primaryKey({
+			name: "anime_genres_pk",
+			columns: [t.annId, t.genreName],
+		}),
 		animeIndex: index("anime_genres_ann_id_idx").on(t.annId),
-		genreIndex: index("anime_genres_genre_idx").on(t.genre),
-		uniquePerAnime: uniqueIndex("anime_genres_ann_genre_uq").on(
-			t.annId,
-			t.genre,
-		),
+		genreIndex: index("anime_genres_genre_name_idx").on(t.genreName),
+	}),
+);
+
+export const tagsTable = sqliteTable(
+	"tags",
+	{
+		/** Primary key is the tag string itself */
+		name: text("name").notNull().primaryKey(),
+	},
+	(t) => ({
+		nameIndex: index("tags_name_idx").on(t.name),
 	}),
 );
 
 export const animeTagsTable = sqliteTable(
 	"anime_tags",
 	{
-		id: integer("id").notNull().primaryKey({ autoIncrement: true }),
 		annId: integer("ann_id")
 			.notNull()
 			.references(() => animeTable.annId, { onDelete: "cascade" }),
-		tag: text("tag").notNull(),
+		tagName: text("tag_name")
+			.notNull()
+			.references(() => tagsTable.name, { onDelete: "cascade" }),
 	},
 	(t) => ({
+		pk: primaryKey({
+			name: "anime_tags_pk",
+			columns: [t.annId, t.tagName],
+		}),
 		animeIndex: index("anime_tags_ann_id_idx").on(t.annId),
-		tagIndex: index("anime_tags_tag_idx").on(t.tag),
-		uniquePerAnime: uniqueIndex("anime_tags_ann_tag_uq").on(t.annId, t.tag),
+		tagIndex: index("anime_tags_tag_name_idx").on(t.tagName),
 	}),
 );
 
@@ -387,6 +414,10 @@ export const animeGenresRelations = relations(animeGenresTable, ({ one }) => ({
 		fields: [animeGenresTable.annId],
 		references: [animeTable.annId],
 	}),
+	genre: one(genresTable, {
+		fields: [animeGenresTable.genreName],
+		references: [genresTable.name],
+	}),
 }));
 
 export const animeTagsRelations = relations(animeTagsTable, ({ one }) => ({
@@ -394,6 +425,10 @@ export const animeTagsRelations = relations(animeTagsTable, ({ one }) => ({
 		fields: [animeTagsTable.annId],
 		references: [animeTable.annId],
 	}),
+	tag: one(tagsTable, {
+		fields: [animeTagsTable.tagName],
+		references: [tagsTable.name],
+	}),
 }));
 
 export const animeSongLinksRelations = relations(