added 'not_like' where clause

Author: dantownsend

piccolo/columns/base.py

@@ -10,6 +10,7 @@
     Like,
     NotEqual,
     NotIn,
+    NotLike
 )
 from ..custom_types import Iterable
 from .combination import Where
@@ -45,6 +46,11 @@ def like(self, value: str) -> Where:
             raise ValueError('% is required for like operators')
         return Where(column=self, value=value, operator=Like)
 
+    def not_like(self, value: str) -> Where:
+        if '%' not in value:
+            raise ValueError('% is required for like operators')
+        return Where(column=self, value=value, operator=NotLike)
+
     def format_value(self, value):
         """
         Takes the raw Python value and return a string usable in the database

piccolo/columns/operators.py

@@ -22,6 +22,10 @@ class Like(Operator):
     template = "{name} LIKE {value}"
 
 
+class NotLike(Operator):
+    template = "{name} NOT LIKE {value}"
+
+
 class GreaterThan(Operator):
     # Add permitted types???
     template = "{name} > {value}"

tests/table/test_select.py

@@ -47,6 +47,24 @@ def test_where_like(self):
             [{'name': 'Pythonistas'}]
         )
 
+    def test_where_not_like(self):
+        self.insert_rows()
+
+        response = Band.select.columns(
+            Band.name
+        ).where(
+            Band.name.not_like('Python%')
+        ).order_by(
+            Band.name
+        ).run_sync()
+
+        print(f'response = {response}')
+
+        self.assertEqual(
+            response,
+            [{'name': 'CSharps'}, {'name': 'Rustaceans'}]
+        )
+
     def test_where_greater_than(self):
         self.insert_rows()