table_config instead of table_metadata (#2257)

Table configuration that was incorrectly placed in metadata is now treated as if it was in config.

New await datasette.table_config() method.

Closes #2247

datasette/app.py

@@ -75,6 +75,7 @@ from .utils import (
     format_bytes,
     module_from_path,
     move_plugins,
+    move_table_config,
     parse_metadata,
     resolve_env_secrets,
     resolve_routes,
@@ -346,7 +347,9 @@ class Datasette:
         # Move any "plugins" settings from metadata to config - updates them in place
         metadata = metadata or {}
         config = config or {}
-        move_plugins(metadata, config)
+        metadata, config = move_plugins(metadata, config)
+        # Now migrate any known table configuration settings over as well
+        metadata, config = move_table_config(metadata, config)
 
         self._metadata_local = metadata or {}
         self.sqlite_extensions = []
@@ -1202,10 +1205,11 @@ class Datasette:
     def _actor(self, request):
         return {"actor": request.actor}
 
-    async def table_config(self, database, table):
-        """Fetch table-specific metadata."""
+    async def table_config(self, database: str, table: str) -> dict:
+        """Return dictionary of configuration for specified table"""
         return (
-            (self.metadata("databases") or {})
+            (self.config or {})
+            .get("databases", {})
             .get(database, {})
             .get("tables", {})
             .get(table, {})

datasette/database.py

@@ -487,13 +487,11 @@ class Database:
                     )
                 ).rows
             ]
-        # Add any from metadata.json
-        db_metadata = self.ds.metadata(database=self.name)
-        if "tables" in db_metadata:
+        # Add any tables marked as hidden in config
+        db_config = self.ds.config.get("databases", {}).get(self.name, {})
+        if "tables" in db_config:
             hidden_tables += [
-                t
-                for t in db_metadata["tables"]
-                if db_metadata["tables"][t].get("hidden")
+                t for t in db_config["tables"] if db_config["tables"][t].get("hidden")
             ]
         # Also mark as hidden any tables which start with the name of a hidden table
         # e.g. "searchable_fts" implies "searchable_fts_content" should be hidden

datasette/utils/__init__.py

@@ -2,6 +2,7 @@ import asyncio
 from contextlib import contextmanager
 import click
 from collections import OrderedDict, namedtuple, Counter
+import copy
 import base64
 import hashlib
 import inspect
@@ -17,7 +18,7 @@ import time
 import types
 import secrets
 import shutil
-from typing import Iterable
+from typing import Iterable, Tuple
 import urllib
 import yaml
 from .shutil_backport import copytree
@@ -1290,11 +1291,24 @@ def make_slot_function(name, datasette, request, **kwargs):
     return inner
 
 
-def move_plugins(source, destination):
+def prune_empty_dicts(d: dict):
+    """
+    Recursively prune all empty dictionaries from a given dictionary.
+    """
+    for key, value in list(d.items()):
+        if isinstance(value, dict):
+            prune_empty_dicts(value)
+            if value == {}:
+                d.pop(key, None)
+
+
+def move_plugins(source: dict, destination: dict) -> Tuple[dict, dict]:
     """
     Move 'plugins' keys from source to destination dictionary. Creates hierarchy in destination if needed.
     After moving, recursively remove any keys in the source that are left empty.
     """
+    source = copy.deepcopy(source)
+    destination = copy.deepcopy(destination)
 
     def recursive_move(src, dest, path=None):
         if path is None:
@@ -1316,18 +1330,49 @@ def move_plugins(source, destination):
                 if not value:
                     src.pop(key, None)
 
-    def prune_empty_dicts(d):
-        """
-        Recursively prune all empty dictionaries from a given dictionary.
-        """
-        for key, value in list(d.items()):
-            if isinstance(value, dict):
-                prune_empty_dicts(value)
-                if value == {}:
-                    d.pop(key, None)
-
     recursive_move(source, destination)
     prune_empty_dicts(source)
+    return source, destination
+
+
+_table_config_keys = (
+    "hidden",
+    "sort",
+    "sort_desc",
+    "size",
+    "sortable_columns",
+    "label_column",
+    "facets",
+    "fts_table",
+    "fts_pk",
+    "searchmode",
+    "units",
+)
+
+
+def move_table_config(metadata: dict, config: dict):
+    """
+    Move all known table configuration keys from metadata to config.
+    """
+    if "databases" not in metadata:
+        return metadata, config
+    metadata = copy.deepcopy(metadata)
+    config = copy.deepcopy(config)
+    for database_name, database in metadata["databases"].items():
+        if "tables" not in database:
+            continue
+        for table_name, table in database["tables"].items():
+            for key in _table_config_keys:
+                if key in table:
+                    config.setdefault("databases", {}).setdefault(
+                        database_name, {}
+                    ).setdefault("tables", {}).setdefault(table_name, {})[
+                        key
+                    ] = table.pop(
+                        key
+                    )
+    prune_empty_dicts(metadata)
+    return metadata, config
 
 
 def redact_keys(original: dict, key_patterns: Iterable) -> dict:

datasette/views/table.py

@@ -142,11 +142,11 @@ async def display_columns_and_rows(
     """Returns columns, rows for specified table - including fancy foreign key treatment"""
     sortable_columns = sortable_columns or set()
     db = datasette.databases[database_name]
-    table_metadata = await datasette.table_config(database_name, table_name)
-    column_descriptions = table_metadata.get("columns") or {}
+    column_descriptions = datasette.metadata("columns", database_name, table_name) or {}
     column_details = {
         col.name: col for col in await db.table_column_details(table_name)
     }
+    table_config = await datasette.table_config(database_name, table_name)
     pks = await db.primary_keys(table_name)
     pks_for_display = pks
     if not pks_for_display:
@@ -193,7 +193,6 @@ async def display_columns_and_rows(
                     "raw": pk_path,
                     "value": markupsafe.Markup(
                         '<a href="{table_path}/{flat_pks_quoted}">{flat_pks}</a>'.format(
-                            base_url=base_url,
                             table_path=datasette.urls.table(database_name, table_name),
                             flat_pks=str(markupsafe.escape(pk_path)),
                             flat_pks_quoted=path_from_row_pks(row, pks, not pks),
@@ -274,9 +273,9 @@ async def display_columns_and_rows(
                         ),
                     )
                 )
-            elif column in table_metadata.get("units", {}) and value != "":
+            elif column in table_config.get("units", {}) and value != "":
                 # Interpret units using pint
-                value = value * ureg(table_metadata["units"][column])
+                value = value * ureg(table_config["units"][column])
                 # Pint uses floating point which sometimes introduces errors in the compact
                 # representation, which we have to round off to avoid ugliness. In the vast
                 # majority of cases this rounding will be inconsequential. I hope.
@@ -591,7 +590,7 @@ class TableDropView(BaseView):
         try:
             data = json.loads(await request.post_body())
             confirm = data.get("confirm")
-        except json.JSONDecodeError as e:
+        except json.JSONDecodeError:
             pass
 
         if not confirm:

tests/test_api.py

@@ -771,7 +771,7 @@ def test_databases_json(app_client_two_attached_databases_one_immutable):
 @pytest.mark.asyncio
 async def test_metadata_json(ds_client):
     response = await ds_client.get("/-/metadata.json")
-    assert response.json() == METADATA
+    assert response.json() == ds_client.ds.metadata()
 
 
 @pytest.mark.asyncio
@@ -1061,3 +1061,102 @@ async def test_config_json(config, expected):
     ds = Datasette(config=config)
     response = await ds.client.get("/-/config.json")
     assert response.json() == expected
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    "metadata,expected_config,expected_metadata",
+    (
+        ({}, {}, {}),
+        (
+            # Metadata input
+            {
+                "title": "Datasette Fixtures",
+                "databases": {
+                    "fixtures": {
+                        "tables": {
+                            "sortable": {
+                                "sortable_columns": [
+                                    "sortable",
+                                    "sortable_with_nulls",
+                                    "sortable_with_nulls_2",
+                                    "text",
+                                ],
+                            },
+                            "no_primary_key": {"sortable_columns": [], "hidden": True},
+                            "units": {"units": {"distance": "m", "frequency": "Hz"}},
+                            "primary_key_multiple_columns_explicit_label": {
+                                "label_column": "content2"
+                            },
+                            "simple_view": {"sortable_columns": ["content"]},
+                            "searchable_view_configured_by_metadata": {
+                                "fts_table": "searchable_fts",
+                                "fts_pk": "pk",
+                            },
+                            "roadside_attractions": {
+                                "columns": {
+                                    "name": "The name of the attraction",
+                                    "address": "The street address for the attraction",
+                                }
+                            },
+                            "attraction_characteristic": {"sort_desc": "pk"},
+                            "facet_cities": {"sort": "name"},
+                            "paginated_view": {"size": 25},
+                        },
+                    }
+                },
+            },
+            # Should produce a config with just the table configuration keys
+            {
+                "databases": {
+                    "fixtures": {
+                        "tables": {
+                            "sortable": {
+                                "sortable_columns": [
+                                    "sortable",
+                                    "sortable_with_nulls",
+                                    "sortable_with_nulls_2",
+                                    "text",
+                                ]
+                            },
+                            "units": {"units": {"distance": "m", "frequency": "Hz"}},
+                            # These one get redacted:
+                            "no_primary_key": "***",
+                            "primary_key_multiple_columns_explicit_label": "***",
+                            "simple_view": {"sortable_columns": ["content"]},
+                            "searchable_view_configured_by_metadata": {
+                                "fts_table": "searchable_fts",
+                                "fts_pk": "pk",
+                            },
+                            "attraction_characteristic": {"sort_desc": "pk"},
+                            "facet_cities": {"sort": "name"},
+                            "paginated_view": {"size": 25},
+                        }
+                    }
+                }
+            },
+            # And metadata with everything else
+            {
+                "title": "Datasette Fixtures",
+                "databases": {
+                    "fixtures": {
+                        "tables": {
+                            "roadside_attractions": {
+                                "columns": {
+                                    "name": "The name of the attraction",
+                                    "address": "The street address for the attraction",
+                                }
+                            },
+                        }
+                    }
+                },
+            },
+        ),
+    ),
+)
+async def test_upgrade_metadata(metadata, expected_config, expected_metadata):
+    ds = Datasette(metadata=metadata)
+    response = await ds.client.get("/-/config.json")
+    assert response.json() == expected_config
+    response2 = await ds.client.get("/-/metadata.json")
+    assert response2.json() == expected_metadata

tests/test_html.py

@@ -753,7 +753,7 @@ async def test_metadata_json_html(ds_client):
     response = await ds_client.get("/-/metadata")
     assert response.status_code == 200
     pre = Soup(response.content, "html.parser").find("pre")
-    assert METADATA == json.loads(pre.text)
+    assert ds_client.ds.metadata() == json.loads(pre.text)
 
 
 @pytest.mark.asyncio