Rename _schemas to _internal, closes #1156

datasette/app.py

@@ -74,7 +74,7 @@ from .utils.asgi import (
     asgi_send_json,
     asgi_send_redirect,
 )
-from .utils.schemas import init_schemas, populate_schema_tables
+from .utils.internal_db import init_internal_db, populate_schema_tables
 from .utils.sqlite import (
     sqlite3,
     using_pysqlite3,
@@ -85,8 +85,6 @@ from .version import __version__
 
 app_root = Path(__file__).parent.parent
 
-MEMORY = object()
-
 Setting = collections.namedtuple("Setting", ("name", "default", "help"))
 SETTINGS = (
     Setting("default_page_size", 100, "Default page size for the table view"),
@@ -218,24 +216,17 @@ class Datasette:
                 ]
         self.inspect_data = inspect_data
         self.immutables = set(immutables or [])
-        if not self.files:
-            self.files = [MEMORY]
-        elif memory:
-            self.files = (MEMORY,) + self.files
         self.databases = collections.OrderedDict()
+        if memory or not self.files:
+            self.add_database(":memory:", Database(self, ":memory:", is_memory=True))
         # memory_name is a random string so that each Datasette instance gets its own
         # unique in-memory named database - otherwise unit tests can fail with weird
         # errors when different instances accidentally share an in-memory database
-        self.add_database("_schemas", Database(self, memory_name=secrets.token_hex()))
-        self._schemas_created = False
+        self.add_database("_internal", Database(self, memory_name=secrets.token_hex()))
+        self._interna_db_created = False
         for file in self.files:
             path = file
-            is_memory = False
-            if file is MEMORY:
-                path = None
-                is_memory = True
-            is_mutable = path not in self.immutables
-            db = Database(self, path, is_mutable=is_mutable, is_memory=is_memory)
+            db = Database(self, path, is_mutable=path not in self.immutables)
             if db.name in self.databases:
                 raise Exception(f"Multiple files with same stem: {db.name}")
             self.add_database(db.name, db)
@@ -333,14 +324,14 @@ class Datasette:
         self.client = DatasetteClient(self)
 
     async def refresh_schemas(self):
-        schema_db = self.databases["_schemas"]
-        if not self._schemas_created:
-            await init_schemas(schema_db)
-            self._schemas_created = True
+        internal_db = self.databases["_internal"]
+        if not self._interna_db_created:
+            await init_internal_db(internal_db)
+            self._interna_db_created = True
 
         current_schema_versions = {
             row["database_name"]: row["schema_version"]
-            for row in await schema_db.execute(
+            for row in await internal_db.execute(
                 "select database_name, schema_version from databases"
             )
         }
@@ -349,7 +340,7 @@ class Datasette:
             # Compare schema versions to see if we should skip it
             if schema_version == current_schema_versions.get(database_name):
                 continue
-            await schema_db.execute_write(
+            await internal_db.execute_write(
                 """
                 INSERT OR REPLACE INTO databases (database_name, path, is_memory, schema_version)
                 VALUES (?, ?, ?, ?)
@@ -357,7 +348,7 @@ class Datasette:
                 [database_name, db.path, db.is_memory, schema_version],
                 block=True,
             )
-            await populate_schema_tables(schema_db, db)
+            await populate_schema_tables(internal_db, db)
 
     @property
     def urls(self):
@@ -376,7 +367,7 @@ class Datasette:
     def get_database(self, name=None):
         if name is None:
             # Return first no-_schemas database
-            name = [key for key in self.databases.keys() if key != "_schemas"][0]
+            name = [key for key in self.databases.keys() if key != "_internal"][0]
         return self.databases[name]
 
     def add_database(self, name, db):
@@ -625,7 +616,7 @@ class Datasette:
                 "hash": d.hash,
             }
             for name, d in sorted(self.databases.items(), key=lambda p: p[1].name)
-            if name != "_schemas"
+            if name != "_internal"
         ]
 
     def _versions(self):

datasette/cli.py

@@ -134,8 +134,8 @@ async def inspect_(files, sqlite_extensions):
     app = Datasette([], immutables=files, sqlite_extensions=sqlite_extensions)
     data = {}
     for name, database in app.databases.items():
-        if name == "_schemas":
-            # Don't include the in-memory _schemas database
+        if name == "_internal":
+            # Don't include the in-memory _internal database
             continue
         counts = await database.table_counts(limit=3600 * 1000)
         data[name] = {

datasette/default_permissions.py

@@ -13,7 +13,7 @@ def permission_allowed(datasette, actor, action, resource):
             if allow is not None:
                 return actor_matches_allow(actor, allow)
         elif action == "view-database":
-            if resource == "_schemas" and (actor is None or actor.get("id") != "root"):
+            if resource == "_internal" and (actor is None or actor.get("id") != "root"):
                 return False
             database_allow = datasette.metadata("allow", database=resource)
             if database_allow is None:

datasette/utils/__init__.py

@@ -1024,7 +1024,7 @@ def find_spatialite():
 
 async def initial_path_for_datasette(datasette):
     "Return suggested path for opening this Datasette, based on number of DBs and tables"
-    databases = dict([p for p in datasette.databases.items() if p[0] != "_schemas"])
+    databases = dict([p for p in datasette.databases.items() if p[0] != "_internal"])
     if len(databases) == 1:
         db_name = next(iter(databases.keys()))
         path = datasette.urls.database(db_name)

datasette/utils/internal_db.py

@@ -1,4 +1,4 @@
-async def init_schemas(db):
+async def init_internal_db(db):
     await db.execute_write(
         """
     CREATE TABLE databases (
@@ -73,15 +73,15 @@ async def init_schemas(db):
     )
 
 
-async def populate_schema_tables(schema_db, db):
+async def populate_schema_tables(internal_db, db):
     database_name = db.name
-    await schema_db.execute_write(
+    await internal_db.execute_write(
         "delete from tables where database_name = ?", [database_name], block=True
     )
     tables = (await db.execute("select * from sqlite_master where type = 'table'")).rows
     for table in tables:
         table_name = table["name"]
-        await schema_db.execute_write(
+        await internal_db.execute_write(
             """
             insert into tables (database_name, table_name, rootpage, sql)
             values (?, ?, ?, ?)
@@ -90,7 +90,7 @@ async def populate_schema_tables(schema_db, db):
             block=True,
         )
         # And the columns
-        await schema_db.execute_write(
+        await internal_db.execute_write(
             "delete from columns where database_name = ? and table_name = ?",
             [database_name, table_name],
             block=True,
@@ -101,7 +101,7 @@ async def populate_schema_tables(schema_db, db):
                 **{"database_name": database_name, "table_name": table_name},
                 **column._asdict(),
             }
-            await schema_db.execute_write(
+            await internal_db.execute_write(
                 """
                 insert into columns (
                     database_name, table_name, cid, name, type, "notnull", default_value, is_pk, hidden
@@ -113,7 +113,7 @@ async def populate_schema_tables(schema_db, db):
                 block=True,
             )
         # And the foreign_keys
-        await schema_db.execute_write(
+        await internal_db.execute_write(
             "delete from foreign_keys where database_name = ? and table_name = ?",
             [database_name, table_name],
             block=True,
@@ -126,7 +126,7 @@ async def populate_schema_tables(schema_db, db):
                 **{"database_name": database_name, "table_name": table_name},
                 **dict(foreign_key),
             }
-            await schema_db.execute_write(
+            await internal_db.execute_write(
                 """
                 insert into foreign_keys (
                     database_name, table_name, "id", seq, "table", "from", "to", on_update, on_delete, match
@@ -138,7 +138,7 @@ async def populate_schema_tables(schema_db, db):
                 block=True,
             )
         # And the indexes
-        await schema_db.execute_write(
+        await internal_db.execute_write(
             "delete from indexes where database_name = ? and table_name = ?",
             [database_name, table_name],
             block=True,
@@ -149,7 +149,7 @@ async def populate_schema_tables(schema_db, db):
                 **{"database_name": database_name, "table_name": table_name},
                 **dict(index),
             }
-            await schema_db.execute_write(
+            await internal_db.execute_write(
                 """
                 insert into indexes (
                     database_name, table_name, seq, name, "unique", origin, partial

tests/test_internal_db.py

@@ -2,36 +2,36 @@ from .fixtures import app_client
 import pytest
 
 
-def test_schemas_only_available_to_root(app_client):
+def test_internal_only_available_to_root(app_client):
     cookie = app_client.actor_cookie({"id": "root"})
-    assert app_client.get("/_schemas").status == 403
-    assert app_client.get("/_schemas", cookies={"ds_actor": cookie}).status == 200
+    assert app_client.get("/_internal").status == 403
+    assert app_client.get("/_internal", cookies={"ds_actor": cookie}).status == 200
 
 
-def test_schemas_databases(app_client):
+def test_internal_databases(app_client):
     cookie = app_client.actor_cookie({"id": "root"})
     databases = app_client.get(
-        "/_schemas/databases.json?_shape=array", cookies={"ds_actor": cookie}
+        "/_internal/databases.json?_shape=array", cookies={"ds_actor": cookie}
     ).json
     assert len(databases) == 2
-    assert databases[0]["database_name"] == "_schemas"
+    assert databases[0]["database_name"] == "_internal"
     assert databases[1]["database_name"] == "fixtures"
 
 
-def test_schemas_tables(app_client):
+def test_internal_tables(app_client):
     cookie = app_client.actor_cookie({"id": "root"})
     tables = app_client.get(
-        "/_schemas/tables.json?_shape=array", cookies={"ds_actor": cookie}
+        "/_internal/tables.json?_shape=array", cookies={"ds_actor": cookie}
     ).json
     assert len(tables) > 5
     table = tables[0]
     assert set(table.keys()) == {"rootpage", "table_name", "database_name", "sql"}
 
 
-def test_schemas_indexes(app_client):
+def test_internal_indexes(app_client):
     cookie = app_client.actor_cookie({"id": "root"})
     indexes = app_client.get(
-        "/_schemas/indexes.json?_shape=array", cookies={"ds_actor": cookie}
+        "/_internal/indexes.json?_shape=array", cookies={"ds_actor": cookie}
     ).json
     assert len(indexes) > 5
     index = indexes[0]
@@ -46,10 +46,10 @@ def test_schemas_indexes(app_client):
     }
 
 
-def test_schemas_foreign_keys(app_client):
+def test_internal_foreign_keys(app_client):
     cookie = app_client.actor_cookie({"id": "root"})
     foreign_keys = app_client.get(
-        "/_schemas/foreign_keys.json?_shape=array", cookies={"ds_actor": cookie}
+        "/_internal/foreign_keys.json?_shape=array", cookies={"ds_actor": cookie}
     ).json
     assert len(foreign_keys) > 5
     foreign_key = foreign_keys[0]

tests/test_plugins.py

@@ -293,7 +293,7 @@ def test_hook_extra_body_script(app_client, path, expected_extra_body_script):
 
 def test_hook_asgi_wrapper(app_client):
     response = app_client.get("/fixtures")
-    assert "_schemas, fixtures" == response.headers["x-databases"]
+    assert "_internal, fixtures" == response.headers["x-databases"]
 
 
 def test_hook_extra_template_vars(restore_working_directory):