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feat: enable unsetting policy tags on schema fields #703

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Jun 21, 2021
Merged

feat: enable unsetting policy tags on schema fields #703

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3932d2a
feat: enable unsetting policy tags on schema fields
plamut Jun 18, 2021
c7b8c02
Adjust API representation for STRUCT schema fields
plamut Jun 18, 2021
5c2b0eb
De-dup logic for converting None policy tags
plamut Jun 21, 2021
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45 changes: 38 additions & 7 deletions google/cloud/bigquery/schema.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@
"""Schemas for BigQuery tables / queries."""

import collections
from typing import Optional

from google.cloud.bigquery_v2 import types

Expand Down Expand Up @@ -105,7 +106,26 @@ def __init__(
if max_length is not _DEFAULT_VALUE:
self._properties["maxLength"] = max_length
self._fields = tuple(fields)
self._policy_tags = policy_tags

self._policy_tags = self._determine_policy_tags(field_type, policy_tags)

@staticmethod
def _determine_policy_tags(
field_type: str, given_policy_tags: Optional["PolicyTagList"]
) -> Optional["PolicyTagList"]:
"""Return the given policy tags, or their suitable representation if `None`.

Args:
field_type: The type of the schema field.
given_policy_tags: The policy tags to maybe ajdust.
"""
if given_policy_tags is not None:
return given_policy_tags

if field_type is not None and field_type.upper() in _STRUCT_TYPES:
return None

return PolicyTagList()

@staticmethod
def __get_int(api_repr, name):
Expand All @@ -126,18 +146,24 @@ def from_api_repr(cls, api_repr: dict) -> "SchemaField":
Returns:
google.cloud.biquery.schema.SchemaField: The ``SchemaField`` object.
"""
field_type = api_repr["type"].upper()

# Handle optional properties with default values
mode = api_repr.get("mode", "NULLABLE")
description = api_repr.get("description", _DEFAULT_VALUE)
fields = api_repr.get("fields", ())

policy_tags = cls._determine_policy_tags(
field_type, PolicyTagList.from_api_repr(api_repr.get("policyTags"))
)

return cls(
field_type=api_repr["type"].upper(),
field_type=field_type,
fields=[cls.from_api_repr(f) for f in fields],
mode=mode.upper(),
description=description,
name=api_repr["name"],
policy_tags=PolicyTagList.from_api_repr(api_repr.get("policyTags")),
policy_tags=policy_tags,
precision=cls.__get_int(api_repr, "precision"),
scale=cls.__get_int(api_repr, "scale"),
max_length=cls.__get_int(api_repr, "maxLength"),
Expand Down Expand Up @@ -218,9 +244,9 @@ def to_api_repr(self) -> dict:
# add this to the serialized representation.
if self.field_type.upper() in _STRUCT_TYPES:
answer["fields"] = [f.to_api_repr() for f in self.fields]

# If this contains a policy tag definition, include that as well:
if self.policy_tags is not None:
else:
# Explicitly include policy tag definition (we must not do it for RECORD
# fields, because those are not leaf fields).
answer["policyTags"] = self.policy_tags.to_api_repr()

# Done; return the serialized dictionary.
Expand All @@ -244,14 +270,19 @@ def _key(self):
field_type = f"{field_type}({self.precision}, {self.scale})"
else:
field_type = f"{field_type}({self.precision})"

policy_tags = (
() if self._policy_tags is None else tuple(sorted(self._policy_tags.names))
)

return (
self.name,
field_type,
# Mode is always str, if not given it defaults to a str value
self.mode.upper(), # pytype: disable=attribute-error
self.description,
self._fields,
self._policy_tags,
policy_tags,
)

def to_standard_sql(self) -> types.StandardSqlField:
Expand Down
50 changes: 50 additions & 0 deletions tests/system/test_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -653,6 +653,56 @@ def test_update_table_schema(self):
self.assertEqual(found.field_type, expected.field_type)
self.assertEqual(found.mode, expected.mode)

def test_unset_table_schema_attributes(self):
from google.cloud.bigquery.schema import PolicyTagList

dataset = self.temp_dataset(_make_dataset_id("unset_policy_tags"))
table_id = "test_table"
policy_tags = PolicyTagList(
names=[
"projects/{}/locations/us/taxonomies/1/policyTags/2".format(
Config.CLIENT.project
),
]
)

schema = [
bigquery.SchemaField("full_name", "STRING", mode="REQUIRED"),
bigquery.SchemaField(
"secret_int",
"INTEGER",
mode="REQUIRED",
description="This field is numeric",
policy_tags=policy_tags,
),
]
table_arg = Table(dataset.table(table_id), schema=schema)
self.assertFalse(_table_exists(table_arg))

table = helpers.retry_403(Config.CLIENT.create_table)(table_arg)
self.to_delete.insert(0, table)

self.assertTrue(_table_exists(table))
self.assertEqual(policy_tags, table.schema[1].policy_tags)

# Amend the schema to replace the policy tags
new_schema = table.schema[:]
old_field = table.schema[1]
new_schema[1] = bigquery.SchemaField(
name=old_field.name,
field_type=old_field.field_type,
mode=old_field.mode,
description=None,
fields=old_field.fields,
policy_tags=None,
)

table.schema = new_schema
updated_table = Config.CLIENT.update_table(table, ["schema"])

self.assertFalse(updated_table.schema[1].description) # Empty string or None.
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I noticed there's a difference between when if description is not set (or set to None), or when set to an empty string. Does this matter?

In any case, it is possible to override the existing description, thus no extra code changes necessary for this.

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Yes, this matters. In fact, it's what requested in #558 (comment)

Similar to what I did for description in #557, we should disambiguate between unset policy tags and empty / none for policy tags.

self.assertEqual(updated_table.schema[1].policy_tags.names, ())

def test_update_table_clustering_configuration(self):
dataset = self.temp_dataset(_make_dataset_id("update_table"))

Expand Down
4 changes: 4 additions & 0 deletions tests/unit/job/test_load_config.py
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Original file line number Diff line number Diff line change
Expand Up @@ -434,11 +434,13 @@ def test_schema_setter_fields(self):
"name": "full_name",
"type": "STRING",
"mode": "REQUIRED",
"policyTags": {"names": []},
}
age_repr = {
"name": "age",
"type": "INTEGER",
"mode": "REQUIRED",
"policyTags": {"names": []},
}
self.assertEqual(
config._properties["load"]["schema"], {"fields": [full_name_repr, age_repr]}
Expand All @@ -451,11 +453,13 @@ def test_schema_setter_valid_mappings_list(self):
"name": "full_name",
"type": "STRING",
"mode": "REQUIRED",
"policyTags": {"names": []},
}
age_repr = {
"name": "age",
"type": "INTEGER",
"mode": "REQUIRED",
"policyTags": {"names": []},
}
schema = [full_name_repr, age_repr]
config.schema = schema
Expand Down
49 changes: 43 additions & 6 deletions tests/unit/test_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1019,8 +1019,18 @@ def test_create_table_w_schema_and_query(self):
{
"schema": {
"fields": [
{"name": "full_name", "type": "STRING", "mode": "REQUIRED"},
{"name": "age", "type": "INTEGER", "mode": "REQUIRED"},
{
"name": "full_name",
"type": "STRING",
"mode": "REQUIRED",
"policyTags": {"names": []},
},
{
"name": "age",
"type": "INTEGER",
"mode": "REQUIRED",
"policyTags": {"names": []},
},
]
},
"view": {"query": query},
Expand Down Expand Up @@ -1054,8 +1064,18 @@ def test_create_table_w_schema_and_query(self):
},
"schema": {
"fields": [
{"name": "full_name", "type": "STRING", "mode": "REQUIRED"},
{"name": "age", "type": "INTEGER", "mode": "REQUIRED"},
{
"name": "full_name",
"type": "STRING",
"mode": "REQUIRED",
"policyTags": {"names": []},
},
{
"name": "age",
"type": "INTEGER",
"mode": "REQUIRED",
"policyTags": {"names": []},
},
]
},
"view": {"query": query, "useLegacySql": False},
Expand Down Expand Up @@ -2000,12 +2020,14 @@ def test_update_table(self):
"type": "STRING",
"mode": "REQUIRED",
"description": None,
"policyTags": {"names": []},
},
{
"name": "age",
"type": "INTEGER",
"mode": "REQUIRED",
"description": "New field description",
"policyTags": {"names": []},
},
]
},
Expand Down Expand Up @@ -2047,12 +2069,14 @@ def test_update_table(self):
"type": "STRING",
"mode": "REQUIRED",
"description": None,
"policyTags": {"names": []},
},
{
"name": "age",
"type": "INTEGER",
"mode": "REQUIRED",
"description": "New field description",
"policyTags": {"names": []},
},
]
},
Expand Down Expand Up @@ -2173,14 +2197,21 @@ def test_update_table_w_query(self):
"type": "STRING",
"mode": "REQUIRED",
"description": None,
"policyTags": {"names": []},
},
{
"name": "age",
"type": "INTEGER",
"mode": "REQUIRED",
"description": "this is a column",
"policyTags": {"names": []},
},
{
"name": "country",
"type": "STRING",
"mode": "NULLABLE",
"policyTags": {"names": []},
},
{"name": "country", "type": "STRING", "mode": "NULLABLE"},
]
}
schema = [
Expand Down Expand Up @@ -6516,10 +6547,10 @@ def test_load_table_from_dataframe(self):
assert field["type"] == table_field.field_type
assert field["mode"] == table_field.mode
assert len(field.get("fields", [])) == len(table_field.fields)
assert field["policyTags"]["names"] == []
# Omit unnecessary fields when they come from getting the table
# (not passed in via job_config)
assert "description" not in field
assert "policyTags" not in field

@unittest.skipIf(pandas is None, "Requires `pandas`")
@unittest.skipIf(pyarrow is None, "Requires `pyarrow`")
Expand Down Expand Up @@ -7718,18 +7749,21 @@ def test_schema_to_json_with_file_path(self):
"description": "quarter",
"mode": "REQUIRED",
"name": "qtr",
"policyTags": {"names": []},
"type": "STRING",
},
{
"description": "sales representative",
"mode": "NULLABLE",
"name": "rep",
"policyTags": {"names": []},
"type": "STRING",
},
{
"description": "total sales",
"mode": "NULLABLE",
"name": "sales",
"policyTags": {"names": []},
"type": "FLOAT",
},
]
Expand Down Expand Up @@ -7762,18 +7796,21 @@ def test_schema_to_json_with_file_object(self):
"description": "quarter",
"mode": "REQUIRED",
"name": "qtr",
"policyTags": {"names": []},
"type": "STRING",
},
{
"description": "sales representative",
"mode": "NULLABLE",
"name": "rep",
"policyTags": {"names": []},
"type": "STRING",
},
{
"description": "total sales",
"mode": "NULLABLE",
"name": "sales",
"policyTags": {"names": []},
"type": "FLOAT",
},
]
Expand Down
9 changes: 8 additions & 1 deletion tests/unit/test_external_config.py
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Original file line number Diff line number Diff line change
Expand Up @@ -78,7 +78,14 @@ def test_to_api_repr_base(self):
ec.schema = [schema.SchemaField("full_name", "STRING", mode="REQUIRED")]

exp_schema = {
"fields": [{"name": "full_name", "type": "STRING", "mode": "REQUIRED"}]
"fields": [
{
"name": "full_name",
"type": "STRING",
"mode": "REQUIRED",
"policyTags": {"names": []},
}
]
}
got_resource = ec.to_api_repr()
exp_resource = {
Expand Down
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