Support multiple filters of the same type

Closes #288

datasette/views/table.py

@@ -221,13 +221,14 @@ class TableView(RowTableShared):
         # it can still be queried using ?_col__exact=blah
         special_args = {}
         special_args_lists = {}
-        other_args = {}
+        other_args = []
         for key, value in args.items():
             if key.startswith("_") and "__" not in key:
                 special_args[key] = value[0]
                 special_args_lists[key] = value
             else:
-                other_args[key] = value[0]
+                for v in value:
+                    other_args.append((key, v))
 
         # Handle ?_filter_column and redirect, if present
         redirect_params = filters_should_redirect(special_args)
@@ -255,7 +256,7 @@ class TableView(RowTableShared):
 
         table_metadata = self.ds.table_metadata(database, table)
         units = table_metadata.get("units", {})
-        filters = Filters(sorted(other_args.items()), units, ureg)
+        filters = Filters(sorted(other_args), units, ureg)
         where_clauses, params = filters.build_where_clauses(table)
 
         extra_wheres_for_ui = []

tests/test_api.py

@@ -903,6 +903,16 @@ def test_table_filter_queries(app_client, path, expected_rows):
     assert expected_rows == response.json['rows']
 
 
+def test_table_filter_queries_multiple_of_same_type(app_client):
+    response = app_client.get(
+        "/fixtures/simple_primary_key.json?content__not=world&content__not=hello"
+    )
+    assert [
+        ['3', ''],
+        ['4', 'RENDER_CELL_DEMO']
+    ] == response.json['rows']
+
+
 @pytest.mark.skipif(
     not detect_json1(),
     reason="Requires the SQLite json1 module"

tests/test_filters.py

@@ -4,88 +4,97 @@ import pytest
 
 @pytest.mark.parametrize('args,expected_where,expected_params', [
     (
-        {
+        (
-            'name_english__contains': 'foo',
+            ('name_english__contains', 'foo'),
-        },
+        ),
         ['"name_english" like :p0'],
         ['%foo%']
     ),
     (
-        {
+        (
-            'foo': 'bar',
+            ('foo', 'bar'),
-            'bar__contains': 'baz',
+            ('bar__contains', 'baz'),
-        },
+        ),
         ['"bar" like :p0', '"foo" = :p1'],
         ['%baz%', 'bar']
     ),
     (
-        {
+        (
-            'foo__startswith': 'bar',
+            ('foo__startswith', 'bar'),
-            'bar__endswith': 'baz',
+            ('bar__endswith', 'baz'),
-        },
+        ),
         ['"bar" like :p0', '"foo" like :p1'],
         ['%baz', 'bar%']
     ),
     (
-        {
+        (
-            'foo__lt': '1',
+            ('foo__lt', '1'),
-            'bar__gt': '2',
+            ('bar__gt', '2'),
-            'baz__gte': '3',
+            ('baz__gte', '3'),
-            'bax__lte': '4',
+            ('bax__lte', '4'),
-        },
+        ),
         ['"bar" > :p0', '"bax" <= :p1', '"baz" >= :p2', '"foo" < :p3'],
         [2, 4, 3, 1]
     ),
     (
-        {
+        (
-            'foo__like': '2%2',
+            ('foo__like', '2%2'),
-            'zax__glob': '3*',
+            ('zax__glob', '3*'),
-        },
+        ),
         ['"foo" like :p0', '"zax" glob :p1'],
         ['2%2', '3*']
     ),
+    # Multiple like arguments:
     (
-        {
+        (
-            'foo__isnull': '1',
+            ('foo__like', '2%2'),
-            'baz__isnull': '1',
+            ('foo__like', '3%3'),
-            'bar__gt': '10'
+        ),
-        },
+        ['"foo" like :p0', '"foo" like :p1'],
+        ['2%2', '3%3']
+    ),
+    (
+        (
+            ('foo__isnull', '1'),
+            ('baz__isnull', '1'),
+            ('bar__gt', '10'),
+        ),
         ['"bar" > :p0', '"baz" is null', '"foo" is null'],
         [10]
     ),
     (
-        {
+        (
-            'foo__in': '1,2,3',
+            ('foo__in', '1,2,3'),
-        },
+        ),
         ['foo in (:p0, :p1, :p2)'],
         ["1", "2", "3"]
     ),
     # date
     (
-        {
+        (
-            "foo__date": "1988-01-01",
+            ("foo__date", "1988-01-01"),
-        },
+        ),
         ["date(foo) = :p0"],
         ["1988-01-01"]
     ),
     # JSON array variants of __in (useful for unexpected characters)
     (
-        {
+        (
-            'foo__in': '[1,2,3]',
+            ('foo__in', '[1,2,3]'),
-        },
+        ),
         ['foo in (:p0, :p1, :p2)'],
         [1, 2, 3]
     ),
     (
-        {
+        (
-            'foo__in': '["dog,cat", "cat[dog]"]',
+            ('foo__in', '["dog,cat", "cat[dog]"]'),
-        },
+        ),
         ['foo in (:p0, :p1)'],
         ["dog,cat", "cat[dog]"]
     ),
 ])
 def test_build_where(args, expected_where, expected_params):
-    f = Filters(sorted(args.items()))
+    f = Filters(sorted(args))
     sql_bits, actual_params = f.build_where_clauses("table")
     assert expected_where == sql_bits
     assert {