Simplify query construction

lib/nntp/tiny/db.py

@@ -83,24 +83,15 @@ class Database():
     def query(self, table, values=dict(), order_by=list()):
         sql = f"select * from {table.name}"
 
-        params = list()
-        first  = True
-
-        for key in values.keys():
-            if first:
-                sql += f" where {table.name}.{key} = ?"
-
-                first = False
-            else:
-                sql += f" and {table.name}.{key} = ?"
-
-            params.append(values[key])
-
-        first = True
+        if len(values) > 0:
+            sql += " where "
+            sql += " and ".join([f"{table.name}.{k} = ?" for k in values])
 
         if len(order_by) > 0:
             sql += " order by"
 
+            first = True
+
             for column, order in order_by:
                 if first:
                     first = False
@@ -115,7 +106,7 @@ class Database():
                     sql += f" {column} desc"
 
         cr = DatabaseTableCursor(table, self.db.cursor())
-        cr.execute(sql, params)
+        cr.execute(sql, list(values.values()))
 
         return cr