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.transform(defaults=...)

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This commit is contained in:
Simon Willison 2020-09-21 19:57:44 -07:00
commit 785c4a80a2
2 changed files with 45 additions and 3 deletions
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18
sqlite_utils/db.py
View file

@ -336,7 +336,7 @@ class Database:
column_extras.append("PRIMARY KEY")
if column_name in not_null:
column_extras.append("NOT NULL")
if column_name in defaults:
if column_name in defaults and defaults[column_name] is not None:
column_extras.append(
"DEFAULT {}".format(self.escape(defaults[column_name]))
)
@ -736,9 +736,9 @@ class Table(Queryable):
drop=None,
pk=pk,
not_null=not_null,
defaults=defaults,
# foreign_keys=foreign_keys,
# column_order=column_order,
# defaults=defaults,
# hash_id=hash_id,
# extracts=extracts,
)
@ -754,6 +754,7 @@ class Table(Queryable):
drop=None,
pk=None,
not_null=None,
defaults=None,
tmp_suffix=None,
):
columns = columns or {}
@ -795,16 +796,27 @@ class Table(Queryable):
elif isinstance(not_null, set):
create_table_not_null.update(rename.get(k) or k for k in not_null)
# defaults=
create_table_defaults = {
(rename.get(c.name) or c.name): c.default_value
for c in self.columns
if c.default_value is not None
}
if defaults is not None:
create_table_defaults.update(
{rename.get(c) or c: v for c, v in defaults.items()}
)
sqls.append(
self.db.create_table_sql(
new_table_name,
dict(new_column_pairs),
pk=pk,
not_null=create_table_not_null,
defaults=create_table_defaults,
# foreign_keys=foreign_keys,
# column_order=column_order,
# not_null=not_null,
# defaults=defaults,
# hash_id=hash_id,
# extracts=extracts,
).strip()

30
tests/test_transform.py
View file

@ -129,3 +129,33 @@ def test_transform_add_not_null_with_rename(fresh_db, not_null):
dogs.schema
== 'CREATE TABLE "dogs" (\n [id] INTEGER PRIMARY KEY,\n [name] TEXT,\n [dog_age] TEXT NOT NULL\n)'
)
def test_transform_defaults(fresh_db):
dogs = fresh_db["dogs"]
dogs.insert({"id": 1, "name": "Cleo", "age": 5}, pk="id")
dogs.transform(defaults={"age": 1})
assert (
dogs.schema
== 'CREATE TABLE "dogs" (\n [id] INTEGER PRIMARY KEY,\n [name] TEXT,\n [age] INTEGER DEFAULT 1\n)'
)
def test_transform_defaults_and_rename_column(fresh_db):
dogs = fresh_db["dogs"]
dogs.insert({"id": 1, "name": "Cleo", "age": 5}, pk="id")
dogs.transform(rename={"age": "dog_age"}, defaults={"age": 1})
assert (
dogs.schema
== 'CREATE TABLE "dogs" (\n [id] INTEGER PRIMARY KEY,\n [name] TEXT,\n [dog_age] INTEGER DEFAULT 1\n)'
)
def test_remove_defaults(fresh_db):
dogs = fresh_db["dogs"]
dogs.insert({"id": 1, "name": "Cleo", "age": 5}, defaults={"age": 1}, pk="id")
dogs.transform(defaults={"age": None})
assert (
dogs.schema
== 'CREATE TABLE "dogs" (\n [id] INTEGER PRIMARY KEY,\n [name] TEXT,\n [age] INTEGER\n)'
)