refactor, adding tests

app/database/versions/v1.sql

@@ -0,0 +1,41 @@
+CREATE TABLE IF NOT EXISTS
+    models (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        path TEXT NOT NULL,
+        name TEXT NOT NULL,
+        description TEXT,
+        architecture TEXT,
+        type TEXT NOT NULL,
+        hash TEXT,
+        source_url TEXT
+    );
+
+CREATE TABLE IF NOT EXISTS
+    tags (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        name TEXT NOT NULL UNIQUE
+    );
+
+CREATE TABLE IF NOT EXISTS
+    model_tags (
+        model_id INTEGER NOT NULL,
+        tag_id INTEGER NOT NULL,
+        PRIMARY KEY (model_id, tag_id),
+        FOREIGN KEY (model_id) REFERENCES models (id) ON DELETE CASCADE,
+        FOREIGN KEY (tag_id) REFERENCES tags (id) ON DELETE CASCADE
+    );
+
+INSERT INTO
+    tags (name)
+VALUES
+    ('character'),
+    ('style'),
+    ('concept'),
+    ('clothing'),
+    ('poses'),
+    ('background'),
+    ('vehicle'),
+    ('buildings'),
+    ('objects'),
+    ('animal'),
+    ('action');