Removed units functionality and Pint dependency

Closes #2400, unblocks #2320

tests/fixtures.py

@@ -379,7 +379,6 @@ METADATA = {
                     ],
                 },
                 "no_primary_key": {"sortable_columns": [], "hidden": True},
-                "units": {"units": {"distance": "m", "frequency": "Hz"}},
                 "primary_key_multiple_columns_explicit_label": {
                     "label_column": "content2"
                 },
@@ -507,16 +506,6 @@ CREATE TABLE "custom_foreign_key_label" (
   FOREIGN KEY ("foreign_key_with_custom_label") REFERENCES [primary_key_multiple_columns_explicit_label](id)
 );
 
-CREATE TABLE units (
-  pk integer primary key,
-  distance int,
-  frequency int
-);
-
-INSERT INTO units VALUES (1, 1, 100);
-INSERT INTO units VALUES (2, 5000, 2500);
-INSERT INTO units VALUES (3, 100000, 75000);
-
 CREATE TABLE tags (
     tag TEXT PRIMARY KEY
 );

tests/plugins/my_plugin.py

@@ -5,18 +5,21 @@ from datasette import tracer
 from datasette.utils import path_with_added_args
 from datasette.utils.asgi import asgi_send_json, Response
 import base64
-import pint
 import json
-import urllib
-
-ureg = pint.UnitRegistry()
+import urllib.parse
 
 
 @hookimpl
 def prepare_connection(conn, database, datasette):
     def convert_units(amount, from_, to_):
         """select convert_units(100, 'm', 'ft');"""
-        return (amount * ureg(from_)).to(to_).to_tuple()[0]
+        # Convert meters to feet
+        if from_ == "m" and to_ == "ft":
+            return amount * 3.28084
+        # Convert feet to meters
+        if from_ == "ft" and to_ == "m":
+            return amount / 3.28084
+        assert False, "Unsupported conversion"
 
     conn.create_function("convert_units", 3, convert_units)
 

tests/test_api.py

@@ -528,16 +528,6 @@ async def test_database_page(ds_client):
             },
             "private": False,
         },
-        {
-            "name": "units",
-            "columns": ["pk", "distance", "frequency"],
-            "primary_keys": ["pk"],
-            "count": 3,
-            "hidden": False,
-            "fts_table": None,
-            "foreign_keys": {"incoming": [], "outgoing": []},
-            "private": False,
-        },
         {
             "name": "no_primary_key",
             "columns": ["content", "a", "b", "c"],
@@ -1133,7 +1123,6 @@ async def test_config_json(config, expected):
                                 ],
                             },
                             "no_primary_key": {"sortable_columns": [], "hidden": True},
-                            "units": {"units": {"distance": "m", "frequency": "Hz"}},
                             "primary_key_multiple_columns_explicit_label": {
                                 "label_column": "content2"
                             },
@@ -1168,7 +1157,6 @@ async def test_config_json(config, expected):
                                     "text",
                                 ]
                             },
-                            "units": {"units": {"distance": "m", "frequency": "Hz"}},
                             # These one get redacted:
                             "no_primary_key": "***",
                             "primary_key_multiple_columns_explicit_label": "***",

tests/test_internals_database.py

@@ -422,7 +422,6 @@ async def test_table_names(db):
         "table/with/slashes.csv",
         "complex_foreign_keys",
         "custom_foreign_key_label",
-        "units",
         "tags",
         "searchable",
         "searchable_tags",

tests/test_plugins.py

@@ -424,8 +424,8 @@ def view_names_client(tmp_path_factory):
     (
         ("/", "index"),
         ("/fixtures", "database"),
-        ("/fixtures/units", "table"),
-        ("/fixtures/units/1", "row"),
+        ("/fixtures/facetable", "table"),
+        ("/fixtures/facetable/1", "row"),
         ("/-/versions", "json_data"),
         ("/fixtures/-/query?sql=select+1", "database"),
     ),

tests/test_table_api.py

@@ -720,22 +720,6 @@ async def test_view(ds_client):
     ]
 
 
-@pytest.mark.xfail
-@pytest.mark.asyncio
-async def test_unit_filters(ds_client):
-    response = await ds_client.get(
-        "/fixtures/units.json?_shape=arrays&distance__lt=75km&frequency__gt=1kHz"
-    )
-    assert response.status_code == 200
-    data = response.json()
-
-    assert data["units"]["distance"] == "m"
-    assert data["units"]["frequency"] == "Hz"
-
-    assert len(data["rows"]) == 1
-    assert data["rows"][0][0] == 2
-
-
 def test_page_size_matching_max_returned_rows(
     app_client_returned_rows_matches_page_size,
 ):