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from sqlite_utils.db import ForeignKey, NoObviousTable
import pytest
def test_insert_m2m_single(fresh_db):
dogs = fresh_db["dogs"]
dogs.insert({"id": 1, "name": "Cleo"}, pk="id").m2m(
"humans", {"id": 1, "name": "Natalie D"}, pk="id"
)
assert {"dogs_humans", "humans", "dogs"} == set(fresh_db.table_names())
humans = fresh_db["humans"]
dogs_humans = fresh_db["dogs_humans"]
assert [{"id": 1, "name": "Natalie D"}] == list(humans.rows)
assert [{"humans_id": 1, "dogs_id": 1}] == list(dogs_humans.rows)
def test_insert_m2m_alter(fresh_db):
dogs = fresh_db["dogs"]
dogs.insert({"id": 1, "name": "Cleo"}, pk="id").m2m(
"humans", {"id": 1, "name": "Natalie D"}, pk="id"
)
dogs.update(1).m2m(
"humans", {"id": 2, "name": "Simon W", "nerd": True}, pk="id", alter=True
)
assert list(fresh_db["humans"].rows) == [
{"id": 1, "name": "Natalie D", "nerd": None},
{"id": 2, "name": "Simon W", "nerd": 1},
]
assert list(fresh_db["dogs_humans"].rows) == [
{"humans_id": 1, "dogs_id": 1},
{"humans_id": 2, "dogs_id": 1},
]
def test_insert_m2m_list(fresh_db):
dogs = fresh_db["dogs"]
dogs.insert({"id": 1, "name": "Cleo"}, pk="id").m2m(
"humans",
[{"id": 1, "name": "Natalie D"}, {"id": 2, "name": "Simon W"}],
pk="id",
)
assert {"dogs", "humans", "dogs_humans"} == set(fresh_db.table_names())
humans = fresh_db["humans"]
dogs_humans = fresh_db["dogs_humans"]
assert [{"humans_id": 1, "dogs_id": 1}, {"humans_id": 2, "dogs_id": 1}] == list(
dogs_humans.rows
)
assert [{"id": 1, "name": "Natalie D"}, {"id": 2, "name": "Simon W"}] == list(
humans.rows
)
assert [
ForeignKey(
table="dogs_humans", column="dogs_id", other_table="dogs", other_column="id"
),
ForeignKey(
table="dogs_humans",
column="humans_id",
other_table="humans",
other_column="id",
),
] == dogs_humans.foreign_keys
def test_insert_m2m_iterable(fresh_db):
iterable_records = ({"id": 1, "name": "Phineas"}, {"id": 2, "name": "Ferb"})
def iterable():
for record in iterable_records:
yield record
platypuses = fresh_db["platypuses"]
platypuses.insert({"id": 1, "name": "Perry"}, pk="id").m2m(
"humans",
iterable(),
pk="id",
)
assert {"platypuses", "humans", "humans_platypuses"} == set(fresh_db.table_names())
humans = fresh_db["humans"]
humans_platypuses = fresh_db["humans_platypuses"]
assert [
{"humans_id": 1, "platypuses_id": 1},
{"humans_id": 2, "platypuses_id": 1},
] == list(humans_platypuses.rows)
assert [{"id": 1, "name": "Phineas"}, {"id": 2, "name": "Ferb"}] == list(
humans.rows
)
assert [
ForeignKey(
table="humans_platypuses",
column="platypuses_id",
other_table="platypuses",
other_column="id",
),
ForeignKey(
table="humans_platypuses",
column="humans_id",
other_table="humans",
other_column="id",
),
] == humans_platypuses.foreign_keys
def test_m2m_with_table_objects(fresh_db):
dogs = fresh_db.table("dogs", pk="id")
humans = fresh_db.table("humans", pk="id")
dogs.insert({"id": 1, "name": "Cleo"}).m2m(
humans, [{"id": 1, "name": "Natalie D"}, {"id": 2, "name": "Simon W"}]
)
expected_tables = {"dogs", "humans", "dogs_humans"}
assert expected_tables == set(fresh_db.table_names())
assert dogs.count == 1
assert humans.count == 2
assert fresh_db["dogs_humans"].count == 2
def test_m2m_lookup(fresh_db):
people = fresh_db.table("people", pk="id")
people.insert({"name": "Wahyu"}).m2m("tags", lookup={"tag": "Coworker"})
people_tags = fresh_db["people_tags"]
tags = fresh_db["tags"]
assert people_tags.exists()
assert tags.exists()
assert [
ForeignKey(
table="people_tags",
column="people_id",
other_table="people",
other_column="id",
),
ForeignKey(
table="people_tags", column="tags_id", other_table="tags", other_column="id"
),
] == people_tags.foreign_keys
assert [{"people_id": 1, "tags_id": 1}] == list(people_tags.rows)
assert [{"id": 1, "name": "Wahyu"}] == list(people.rows)
assert [{"id": 1, "tag": "Coworker"}] == list(tags.rows)
def test_m2m_requires_either_records_or_lookup(fresh_db):
people = fresh_db.table("people", pk="id").insert({"name": "Wahyu"})
with pytest.raises(AssertionError):
people.m2m("tags")
with pytest.raises(AssertionError):
people.m2m("tags", {"tag": "hello"}, lookup={"foo": "bar"})
def test_m2m_explicit_table_name_argument(fresh_db):
people = fresh_db.table("people", pk="id")
people.insert({"name": "Wahyu"}).m2m(
"tags", lookup={"tag": "Coworker"}, m2m_table="tagged"
)
assert fresh_db["tags"].exists
assert fresh_db["tagged"].exists
assert not fresh_db["people_tags"].exists()
def test_m2m_table_candidates(fresh_db):
fresh_db.create_table("one", {"id": int, "name": str}, pk="id")
fresh_db.create_table("two", {"id": int, "name": str}, pk="id")
fresh_db.create_table("three", {"id": int, "name": str}, pk="id")
# No candidates at first
assert [] == fresh_db.m2m_table_candidates("one", "two")
# Create a candidate
fresh_db.create_table(
"one_m2m_two", {"one_id": int, "two_id": int}, foreign_keys=["one_id", "two_id"]
)
assert ["one_m2m_two"] == fresh_db.m2m_table_candidates("one", "two")
# Add another table and there should be two candidates
fresh_db.create_table(
"one_m2m_two_and_three",
{"one_id": int, "two_id": int, "three_id": int},
foreign_keys=["one_id", "two_id", "three_id"],
)
assert {"one_m2m_two", "one_m2m_two_and_three"} == set(
fresh_db.m2m_table_candidates("one", "two")
)
def test_uses_existing_m2m_table_if_exists(fresh_db):
# Code should look for an existing table with fks to both tables
# and use that if it exists.
people = fresh_db.create_table("people", {"id": int, "name": str}, pk="id")
fresh_db["tags"].lookup({"tag": "Coworker"})
fresh_db.create_table(
"tagged",
{"people_id": int, "tags_id": int},
foreign_keys=["people_id", "tags_id"],
)
people.insert({"name": "Wahyu"}).m2m("tags", lookup={"tag": "Coworker"})
assert fresh_db["tags"].exists()
assert fresh_db["tagged"].exists()
assert not fresh_db["people_tags"].exists()
assert not fresh_db["tags_people"].exists()
assert [{"people_id": 1, "tags_id": 1}] == list(fresh_db["tagged"].rows)
def test_requires_explicit_m2m_table_if_multiple_options(fresh_db):
# If the code scans for m2m tables and finds more than one candidate
# it should require that the m2m_table=x argument is used
people = fresh_db.create_table("people", {"id": int, "name": str}, pk="id")
fresh_db["tags"].lookup({"tag": "Coworker"})
fresh_db.create_table(
"tagged",
{"people_id": int, "tags_id": int},
foreign_keys=["people_id", "tags_id"],
)
fresh_db.create_table(
"tagged2",
{"people_id": int, "tags_id": int},
foreign_keys=["people_id", "tags_id"],
)
with pytest.raises(NoObviousTable):
people.insert({"name": "Wahyu"}).m2m("tags", lookup={"tag": "Coworker"})
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