fix(unique)_func_insert

dbtable.py

@@ -64,8 +64,11 @@ class DbTable:
         sql += ", ".join(self.column_names_without_id()) + ") VALUES("
         sql += ", ".join(vals) + ")"
         cur = self.dbconn.conn.cursor()
+        try:
             cur.execute(sql)
             self.dbconn.conn.commit()
+        except psycopg2.errors.UniqueViolation:
+            self.dbconn.conn.rollback()
         return
 
     def first(self):

main.py

@@ -117,7 +117,7 @@ class Main:
             else:
                 return next_step
 
-    def show_add_cath(self):
+    def add_cath(self):
         data = []
         data.append(input("Введите название (1 - отмена): ").strip())
         if data[0] == "1":
@@ -178,7 +178,7 @@ class Main:
             elif current_menu == "2":
                 self.show_main_menu()
             elif current_menu == "3":
-                self.show_add_cath()
+                self.add_cath()
                 current_menu = "1"
         print("До свидания!")    
         return