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document.py
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document.py
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import copy
import numbers
import warnings
from functools import partial
import pymongo
from bson import SON, DBRef, ObjectId, json_util
from mongoengine import signals
from mongoengine.base.common import _DocumentRegistry
from mongoengine.base.datastructures import (
BaseDict,
BaseList,
EmbeddedDocumentList,
LazyReference,
StrictDict,
)
from mongoengine.base.fields import ComplexBaseField
from mongoengine.common import _import_class
from mongoengine.errors import (
FieldDoesNotExist,
InvalidDocumentError,
LookUpError,
OperationError,
ValidationError,
)
from mongoengine.pymongo_support import LEGACY_JSON_OPTIONS
__all__ = ("BaseDocument", "NON_FIELD_ERRORS")
NON_FIELD_ERRORS = "__all__"
try:
GEOHAYSTACK = pymongo.GEOHAYSTACK
except AttributeError:
GEOHAYSTACK = None
class BaseDocument:
# TODO simplify how `_changed_fields` is used.
# Currently, handling of `_changed_fields` seems unnecessarily convoluted:
# 1. `BaseDocument` defines `_changed_fields` in its `__slots__`, yet it's
# not setting it to `[]` (or any other value) in `__init__`.
# 2. `EmbeddedDocument` sets `_changed_fields` to `[]` it its overloaded
# `__init__`.
# 3. `Document` does NOT set `_changed_fields` upon initialization. The
# field is primarily set via `_from_son` or `_clear_changed_fields`,
# though there are also other methods that manipulate it.
# 4. The codebase is littered with `hasattr` calls for `_changed_fields`.
__slots__ = (
"_changed_fields",
"_initialised",
"_created",
"_data",
"_dynamic_fields",
"_auto_id_field",
"_db_field_map",
"__weakref__",
)
_dynamic = False
_dynamic_lock = True
STRICT = False
def __init__(self, *args, **values):
"""
Initialise a document or an embedded document.
:param values: A dictionary of keys and values for the document.
It may contain additional reserved keywords, e.g. "__auto_convert".
:param __auto_convert: If True, supplied values will be converted
to Python-type values via each field's `to_python` method.
:param _created: Indicates whether this is a brand new document
or whether it's already been persisted before. Defaults to true.
"""
self._initialised = False
self._created = True
if args:
raise TypeError(
"Instantiating a document with positional arguments is not "
"supported. Please use `field_name=value` keyword arguments."
)
__auto_convert = values.pop("__auto_convert", True)
_created = values.pop("_created", True)
signals.pre_init.send(self.__class__, document=self, values=values)
# Check if there are undefined fields supplied to the constructor,
# if so raise an Exception.
if not self._dynamic and (self._meta.get("strict", True) or _created):
_undefined_fields = set(values.keys()) - set(
list(self._fields.keys()) + ["id", "pk", "_cls", "_text_score"]
)
if _undefined_fields:
msg = f'The fields "{_undefined_fields}" do not exist on the document "{self._class_name}"'
raise FieldDoesNotExist(msg)
if self.STRICT and not self._dynamic:
self._data = StrictDict.create(allowed_keys=self._fields_ordered)()
else:
self._data = {}
self._dynamic_fields = SON()
# Assign default values for fields
# not set in the constructor
for field_name in self._fields:
if field_name in values:
continue
value = getattr(self, field_name, None)
setattr(self, field_name, value)
if "_cls" not in values:
self._cls = self._class_name
# Set actual values
dynamic_data = {}
FileField = _import_class("FileField")
for key, value in values.items():
field = self._fields.get(key)
if field or key in ("id", "pk", "_cls"):
if __auto_convert and value is not None:
if field and not isinstance(field, FileField):
value = field.to_python(value)
setattr(self, key, value)
else:
if self._dynamic:
dynamic_data[key] = value
else:
# For strict Document
self._data[key] = value
# Set any get_<field>_display methods
self.__set_field_display()
if self._dynamic:
self._dynamic_lock = False
for key, value in dynamic_data.items():
setattr(self, key, value)
# Flag initialised
self._initialised = True
self._created = _created
signals.post_init.send(self.__class__, document=self)
def __delattr__(self, *args, **kwargs):
"""Handle deletions of fields"""
field_name = args[0]
if field_name in self._fields:
default = self._fields[field_name].default
if callable(default):
default = default()
setattr(self, field_name, default)
else:
super().__delattr__(*args, **kwargs)
def __setattr__(self, name, value):
# Handle dynamic data only if an initialised dynamic document
if self._dynamic and not self._dynamic_lock:
if name not in self._fields_ordered and not name.startswith("_"):
DynamicField = _import_class("DynamicField")
field = DynamicField(db_field=name, null=True)
field.name = name
self._dynamic_fields[name] = field
self._fields_ordered += (name,)
if not name.startswith("_"):
value = self.__expand_dynamic_values(name, value)
# Handle marking data as changed
if name in self._dynamic_fields:
self._data[name] = value
if hasattr(self, "_changed_fields"):
self._mark_as_changed(name)
try:
self__created = self._created
except AttributeError:
self__created = True
if (
self._is_document
and not self__created
and name in self._meta.get("shard_key", tuple())
and self._data.get(name) != value
):
msg = "Shard Keys are immutable. Tried to update %s" % name
raise OperationError(msg)
try:
self__initialised = self._initialised
except AttributeError:
self__initialised = False
# Check if the user has created a new instance of a class
if (
self._is_document
and self__initialised
and self__created
and name == self._meta.get("id_field")
):
# When setting the ID field of an instance already instantiated and that was user-created (i.e not saved in db yet)
# Typically this is when calling .save()
super().__setattr__("_created", False)
super().__setattr__(name, value)
def __getstate__(self):
data = {}
for k in (
"_changed_fields",
"_initialised",
"_created",
"_dynamic_fields",
"_fields_ordered",
):
if hasattr(self, k):
data[k] = getattr(self, k)
data["_data"] = self.to_mongo()
return data
def __setstate__(self, data):
if isinstance(data["_data"], SON):
data["_data"] = self.__class__._from_son(data["_data"])._data
for k in (
"_changed_fields",
"_initialised",
"_created",
"_data",
"_dynamic_fields",
):
if k in data:
setattr(self, k, data[k])
if "_fields_ordered" in data:
if self._dynamic:
self._fields_ordered = data["_fields_ordered"]
else:
_super_fields_ordered = type(self)._fields_ordered
self._fields_ordered = _super_fields_ordered
dynamic_fields = data.get("_dynamic_fields") or SON()
for k in dynamic_fields.keys():
setattr(self, k, data["_data"].get(k))
def __iter__(self):
return iter(self._fields_ordered)
def __getitem__(self, name):
"""Dictionary-style field access, return a field's value if present."""
try:
if name in self._fields_ordered:
return getattr(self, name)
except AttributeError:
pass
raise KeyError(name)
def __setitem__(self, name, value):
"""Dictionary-style field access, set a field's value."""
# Ensure that the field exists before settings its value
if not self._dynamic and name not in self._fields:
raise KeyError(name)
return setattr(self, name, value)
def __contains__(self, name):
try:
val = getattr(self, name)
return val is not None
except AttributeError:
return False
def __len__(self):
return len(self._data)
def __repr__(self):
try:
u = self.__str__()
except (UnicodeEncodeError, UnicodeDecodeError):
u = "[Bad Unicode data]"
repr_type = str if u is None else type(u)
return repr_type(f"<{self.__class__.__name__}: {u}>")
def __str__(self):
# TODO this could be simpler?
if hasattr(self, "__unicode__"):
return self.__unicode__()
return "%s object" % self.__class__.__name__
def __eq__(self, other):
if (
isinstance(other, self.__class__)
and hasattr(other, "id")
and other.id is not None
):
return self.id == other.id
if isinstance(other, DBRef):
return (
self._get_collection_name() == other.collection and self.id == other.id
)
if self.id is None:
return self is other
return False
def __ne__(self, other):
return not self.__eq__(other)
def clean(self):
"""
Hook for doing document level data cleaning (usually validation or assignment)
before validation is run.
Any ValidationError raised by this method will not be associated with
a particular field; it will have a special-case association with the
field defined by NON_FIELD_ERRORS.
"""
pass
def get_text_score(self):
"""
Get text score from text query
"""
if "_text_score" not in self._data:
raise InvalidDocumentError(
"This document is not originally built from a text query (or text_score was not set on search_text() call)"
)
return self._data["_text_score"]
def to_mongo(self, use_db_field=True, fields=None):
"""
Return as SON data ready for use with MongoDB.
"""
fields = fields or []
data = SON()
data["_id"] = None
data["_cls"] = self._class_name
# only root fields ['test1.a', 'test2'] => ['test1', 'test2']
root_fields = {f.split(".")[0] for f in fields}
for field_name in self:
if root_fields and field_name not in root_fields:
continue
value = self._data.get(field_name, None)
field = self._fields.get(field_name)
if field is None and self._dynamic:
field = self._dynamic_fields.get(field_name)
if value is not None:
f_inputs = field.to_mongo.__code__.co_varnames
ex_vars = {}
if fields and "fields" in f_inputs:
key = "%s." % field_name
embedded_fields = [
i.replace(key, "") for i in fields if i.startswith(key)
]
ex_vars["fields"] = embedded_fields
if "use_db_field" in f_inputs:
ex_vars["use_db_field"] = use_db_field
value = field.to_mongo(value, **ex_vars)
# Handle self generating fields
if value is None and field._auto_gen:
value = field.generate()
self._data[field_name] = value
if value is not None or field.null:
if use_db_field:
data[field.db_field] = value
else:
data[field.name] = value
# Only add _cls if allow_inheritance is True
if not self._meta.get("allow_inheritance"):
data.pop("_cls")
return data
def validate(self, clean=True):
"""Ensure that all fields' values are valid and that required fields
are present.
Raises :class:`ValidationError` if any of the fields' values are found
to be invalid.
"""
# Ensure that each field is matched to a valid value
errors = {}
if clean:
try:
self.clean()
except ValidationError as error:
errors[NON_FIELD_ERRORS] = error
# Get a list of tuples of field names and their current values
fields = [
(
self._fields.get(name, self._dynamic_fields.get(name)),
self._data.get(name),
)
for name in self._fields_ordered
]
EmbeddedDocumentField = _import_class("EmbeddedDocumentField")
GenericEmbeddedDocumentField = _import_class("GenericEmbeddedDocumentField")
for field, value in fields:
if value is not None:
try:
if isinstance(
field, (EmbeddedDocumentField, GenericEmbeddedDocumentField)
):
field._validate(value, clean=clean)
else:
field._validate(value)
except ValidationError as error:
errors[field.name] = error.errors or error
except (ValueError, AttributeError, AssertionError) as error:
errors[field.name] = error
elif field.required and not getattr(field, "_auto_gen", False):
errors[field.name] = ValidationError(
"Field is required", field_name=field.name
)
if errors:
pk = "None"
if hasattr(self, "pk"):
pk = self.pk
elif self._instance and hasattr(self._instance, "pk"):
pk = self._instance.pk
message = f"ValidationError ({self._class_name}:{pk}) "
raise ValidationError(message, errors=errors)
def to_json(self, *args, **kwargs):
"""Convert this document to JSON.
:param use_db_field: Serialize field names as they appear in
MongoDB (as opposed to attribute names on this document).
Defaults to True.
"""
use_db_field = kwargs.pop("use_db_field", True)
if "json_options" not in kwargs:
warnings.warn(
"No 'json_options' are specified! Falling back to "
"LEGACY_JSON_OPTIONS with uuid_representation=PYTHON_LEGACY. "
"For use with other MongoDB drivers specify the UUID "
"representation to use. This will be changed to "
"uuid_representation=UNSPECIFIED in a future release.",
DeprecationWarning,
stacklevel=2,
)
kwargs["json_options"] = LEGACY_JSON_OPTIONS
return json_util.dumps(self.to_mongo(use_db_field), *args, **kwargs)
@classmethod
def from_json(cls, json_data, created=False, **kwargs):
"""Converts json data to a Document instance.
:param str json_data: The json data to load into the Document.
:param bool created: Boolean defining whether to consider the newly
instantiated document as brand new or as persisted already:
* If True, consider the document as brand new, no matter what data
it's loaded with (i.e., even if an ID is loaded).
* If False and an ID is NOT provided, consider the document as
brand new.
* If False and an ID is provided, assume that the object has
already been persisted (this has an impact on the subsequent
call to .save()).
* Defaults to ``False``.
"""
# TODO should `created` default to False? If the object already exists
# in the DB, you would likely retrieve it from MongoDB itself through
# a query, not load it from JSON data.
if "json_options" not in kwargs:
warnings.warn(
"No 'json_options' are specified! Falling back to "
"LEGACY_JSON_OPTIONS with uuid_representation=PYTHON_LEGACY. "
"For use with other MongoDB drivers specify the UUID "
"representation to use. This will be changed to "
"uuid_representation=UNSPECIFIED in a future release.",
DeprecationWarning,
stacklevel=2,
)
kwargs["json_options"] = LEGACY_JSON_OPTIONS
return cls._from_son(json_util.loads(json_data, **kwargs), created=created)
def __expand_dynamic_values(self, name, value):
"""Expand any dynamic values to their correct types / values."""
if not isinstance(value, (dict, list, tuple)):
return value
# If the value is a dict with '_cls' in it, turn it into a document
is_dict = isinstance(value, dict)
if is_dict and "_cls" in value:
cls = _DocumentRegistry.get(value["_cls"])
return cls(**value)
if is_dict:
value = {k: self.__expand_dynamic_values(k, v) for k, v in value.items()}
else:
value = [self.__expand_dynamic_values(name, v) for v in value]
# Convert lists / values so we can watch for any changes on them
EmbeddedDocumentListField = _import_class("EmbeddedDocumentListField")
if isinstance(value, (list, tuple)) and not isinstance(value, BaseList):
if issubclass(type(self), EmbeddedDocumentListField):
value = EmbeddedDocumentList(value, self, name)
else:
value = BaseList(value, self, name)
elif isinstance(value, dict) and not isinstance(value, BaseDict):
value = BaseDict(value, self, name)
return value
def _mark_as_changed(self, key):
"""Mark a key as explicitly changed by the user."""
if not hasattr(self, "_changed_fields"):
return
if "." in key:
key, rest = key.split(".", 1)
key = self._db_field_map.get(key, key)
key = f"{key}.{rest}"
else:
key = self._db_field_map.get(key, key)
if key not in self._changed_fields:
levels, idx = key.split("."), 1
while idx <= len(levels):
if ".".join(levels[:idx]) in self._changed_fields:
break
idx += 1
else:
self._changed_fields.append(key)
# remove lower level changed fields
level = ".".join(levels[:idx]) + "."
remove = self._changed_fields.remove
for field in self._changed_fields[:]:
if field.startswith(level):
remove(field)
def _clear_changed_fields(self):
"""Using _get_changed_fields iterate and remove any fields that
are marked as changed.
"""
ReferenceField = _import_class("ReferenceField")
GenericReferenceField = _import_class("GenericReferenceField")
for changed in self._get_changed_fields():
parts = changed.split(".")
data = self
for part in parts:
if isinstance(data, list):
try:
data = data[int(part)]
except IndexError:
data = None
elif isinstance(data, dict):
data = data.get(part, None)
else:
field_name = data._reverse_db_field_map.get(part, part)
data = getattr(data, field_name, None)
if not isinstance(data, LazyReference) and hasattr(
data, "_changed_fields"
):
if getattr(data, "_is_document", False):
continue
data._changed_fields = []
elif isinstance(data, (list, tuple, dict)):
if hasattr(data, "field") and isinstance(
data.field, (ReferenceField, GenericReferenceField)
):
continue
BaseDocument._nestable_types_clear_changed_fields(data)
self._changed_fields = []
@staticmethod
def _nestable_types_clear_changed_fields(data):
"""Inspect nested data for changed fields
:param data: data to inspect for changes
"""
Document = _import_class("Document")
# Loop list / dict fields as they contain documents
# Determine the iterator to use
if not hasattr(data, "items"):
iterator = enumerate(data)
else:
iterator = data.items()
for _index_or_key, value in iterator:
if hasattr(value, "_get_changed_fields") and not isinstance(
value, Document
): # don't follow references
value._clear_changed_fields()
elif isinstance(value, (list, tuple, dict)):
BaseDocument._nestable_types_clear_changed_fields(value)
@staticmethod
def _nestable_types_changed_fields(changed_fields, base_key, data):
"""Inspect nested data for changed fields
:param changed_fields: Previously collected changed fields
:param base_key: The base key that must be used to prepend changes to this data
:param data: data to inspect for changes
"""
# Loop list / dict fields as they contain documents
# Determine the iterator to use
if not hasattr(data, "items"):
iterator = enumerate(data)
else:
iterator = data.items()
for index_or_key, value in iterator:
item_key = f"{base_key}{index_or_key}."
# don't check anything lower if this key is already marked
# as changed.
if item_key[:-1] in changed_fields:
continue
if hasattr(value, "_get_changed_fields"):
changed = value._get_changed_fields()
changed_fields += [f"{item_key}{k}" for k in changed if k]
elif isinstance(value, (list, tuple, dict)):
BaseDocument._nestable_types_changed_fields(
changed_fields, item_key, value
)
def _get_changed_fields(self):
"""Return a list of all fields that have explicitly been changed."""
EmbeddedDocument = _import_class("EmbeddedDocument")
LazyReferenceField = _import_class("LazyReferenceField")
ReferenceField = _import_class("ReferenceField")
GenericLazyReferenceField = _import_class("GenericLazyReferenceField")
GenericReferenceField = _import_class("GenericReferenceField")
SortedListField = _import_class("SortedListField")
changed_fields = []
changed_fields += getattr(self, "_changed_fields", [])
for field_name in self._fields_ordered:
db_field_name = self._db_field_map.get(field_name, field_name)
key = "%s." % db_field_name
data = self._data.get(field_name, None)
field = self._fields.get(field_name)
if db_field_name in changed_fields:
# Whole field already marked as changed, no need to go further
continue
if isinstance(field, ReferenceField): # Don't follow referenced documents
continue
if isinstance(data, EmbeddedDocument):
# Find all embedded fields that have been changed
changed = data._get_changed_fields()
changed_fields += [f"{key}{k}" for k in changed if k]
elif isinstance(data, (list, tuple, dict)):
if hasattr(field, "field") and isinstance(
field.field,
(
LazyReferenceField,
ReferenceField,
GenericLazyReferenceField,
GenericReferenceField,
),
):
continue
elif isinstance(field, SortedListField) and field._ordering:
# if ordering is affected whole list is changed
if any(field._ordering in d._changed_fields for d in data):
changed_fields.append(db_field_name)
continue
self._nestable_types_changed_fields(changed_fields, key, data)
return changed_fields
def _delta(self):
"""Returns the delta (set, unset) of the changes for a document.
Gets any values that have been explicitly changed.
"""
# Handles cases where not loaded from_son but has _id
doc = self.to_mongo()
set_fields = self._get_changed_fields()
unset_data = {}
if hasattr(self, "_changed_fields"):
set_data = {}
# Fetch each set item from its path
for path in set_fields:
parts = path.split(".")
d = doc
new_path = []
for p in parts:
if isinstance(d, (ObjectId, DBRef)):
# Don't dig in the references
break
elif isinstance(d, list) and p.isdigit():
# An item of a list (identified by its index) is updated
d = d[int(p)]
elif hasattr(d, "get"):
# dict-like (dict, embedded document)
d = d.get(p)
new_path.append(p)
path = ".".join(new_path)
set_data[path] = d
else:
set_data = doc
if "_id" in set_data:
del set_data["_id"]
# Determine if any changed items were actually unset.
for path, value in list(set_data.items()):
if value or isinstance(
value, (numbers.Number, bool)
): # Account for 0 and True that are truthy
continue
parts = path.split(".")
if self._dynamic and len(parts) and parts[0] in self._dynamic_fields:
del set_data[path]
unset_data[path] = 1
continue
# If we've set a value that ain't the default value don't unset it.
default = None
if path in self._fields:
default = self._fields[path].default
else: # Perform a full lookup for lists / embedded lookups
d = self
db_field_name = parts.pop()
for p in parts:
if isinstance(d, list) and p.isdigit():
d = d[int(p)]
elif hasattr(d, "__getattribute__") and not isinstance(d, dict):
real_path = d._reverse_db_field_map.get(p, p)
d = getattr(d, real_path)
else:
d = d.get(p)
if hasattr(d, "_fields"):
field_name = d._reverse_db_field_map.get(
db_field_name, db_field_name
)
if field_name in d._fields:
default = d._fields.get(field_name).default
else:
default = None
if default is not None:
default = default() if callable(default) else default
if value != default:
continue
del set_data[path]
unset_data[path] = 1
return set_data, unset_data
@classmethod
def _get_collection_name(cls):
"""Return the collection name for this class. None for abstract
class.
"""
return cls._meta.get("collection", None)
@classmethod
def _from_son(cls, son, _auto_dereference=True, created=False):
"""Create an instance of a Document (subclass) from a PyMongo SON (dict)"""
if son and not isinstance(son, dict):
raise ValueError(
"The source SON object needs to be of type 'dict' but a '%s' was found"
% type(son)
)
# Get the class name from the document, falling back to the given
# class if unavailable
class_name = son.get("_cls", cls._class_name)
# Convert SON to a data dict, making sure each key is a string and
# corresponds to the right db field.
# This is needed as _from_son is currently called both from BaseDocument.__init__
# and from EmbeddedDocumentField.to_python
data = {}
for key, value in son.items():
key = str(key)
key = cls._db_field_map.get(key, key)
data[key] = value
# Return correct subclass for document type
if class_name != cls._class_name:
cls = _DocumentRegistry.get(class_name)
errors_dict = {}
fields = cls._fields
if not _auto_dereference:
# if auto_deref is turned off, we copy the fields so
# we can mutate the auto_dereference of the fields
fields = copy.deepcopy(fields)
# Apply field-name / db-field conversion
for field_name, field in fields.items():
field.set_auto_dereferencing(
_auto_dereference
) # align the field's auto-dereferencing with the document's
if field.db_field in data:
value = data[field.db_field]
try:
data[field_name] = (
value if value is None else field.to_python(value)
)
if field_name != field.db_field:
del data[field.db_field]
except (AttributeError, ValueError) as e:
errors_dict[field_name] = e
if errors_dict:
errors = "\n".join([f"Field '{k}' - {v}" for k, v in errors_dict.items()])
msg = "Invalid data to create a `{}` instance.\n{}".format(
cls._class_name,
errors,
)
raise InvalidDocumentError(msg)
# In STRICT documents, remove any keys that aren't in cls._fields
if cls.STRICT:
data = {k: v for k, v in data.items() if k in cls._fields}
obj = cls(__auto_convert=False, _created=created, **data)
obj._changed_fields = []
if not _auto_dereference:
obj._fields = fields
return obj
@classmethod
def _build_index_specs(cls, meta_indexes):
"""Generate and merge the full index specs."""
geo_indices = cls._geo_indices()
unique_indices = cls._unique_with_indexes()
index_specs = [cls._build_index_spec(spec) for spec in meta_indexes]
def merge_index_specs(index_specs, indices):
"""Helper method for merging index specs."""
if not indices:
return index_specs
# Create a map of index fields to index spec. We're converting
# the fields from a list to a tuple so that it's hashable.
spec_fields = {tuple(index["fields"]): index for index in index_specs}
# For each new index, if there's an existing index with the same
# fields list, update the existing spec with all data from the
# new spec.
for new_index in indices:
candidate = spec_fields.get(tuple(new_index["fields"]))
if candidate is None:
index_specs.append(new_index)
else:
candidate.update(new_index)
return index_specs
# Merge geo indexes and unique_with indexes into the meta index specs.
index_specs = merge_index_specs(index_specs, geo_indices)
index_specs = merge_index_specs(index_specs, unique_indices)
return index_specs
@classmethod
def _build_index_spec(cls, spec):
"""Build a PyMongo index spec from a MongoEngine index spec."""
if isinstance(spec, str):
spec = {"fields": [spec]}
elif isinstance(spec, (list, tuple)):
spec = {"fields": list(spec)}
elif isinstance(spec, dict):
spec = dict(spec)
index_list = []
direction = None
# Check to see if we need to include _cls
allow_inheritance = cls._meta.get("allow_inheritance")
include_cls = (
allow_inheritance
and not spec.get("sparse", False)
and spec.get("cls", True)
and "_cls" not in spec["fields"]
)
# 733: don't include cls if index_cls is False unless there is an explicit cls with the index
include_cls = include_cls and (
spec.get("cls", False) or cls._meta.get("index_cls", True)
)
if "cls" in spec:
spec.pop("cls")
for key in spec["fields"]:
# If inherited spec continue
if isinstance(key, (list, tuple)):
continue
# ASCENDING from +
# DESCENDING from -
# TEXT from $
# HASHED from #
# GEOSPHERE from (
# GEOHAYSTACK from )
# GEO2D from *
direction = pymongo.ASCENDING
if key.startswith("-"):
direction = pymongo.DESCENDING
elif key.startswith("$"):
direction = pymongo.TEXT
elif key.startswith("#"):
direction = pymongo.HASHED
elif key.startswith("("):
direction = pymongo.GEOSPHERE
elif key.startswith(")"):
try:
direction = pymongo.GEOHAYSTACK
except AttributeError:
raise NotImplementedError
elif key.startswith("*"):
direction = pymongo.GEO2D
if key.startswith(("+", "-", "*", "$", "#", "(", ")")):
key = key[1:]
# Use real field name, do it manually because we need field
# objects for the next part (list field checking)
parts = key.split(".")
if parts in (["pk"], ["id"], ["_id"]):
key = "_id"
else:
fields = cls._lookup_field(parts)
parts = []
for field in fields:
try:
if field != "_id":
field = field.db_field
except AttributeError:
pass
parts.append(field)
key = ".".join(parts)
index_list.append((key, direction))
# Don't add cls to a geo index
if (
include_cls
and direction not in (pymongo.GEO2D, pymongo.GEOSPHERE)
and (GEOHAYSTACK is None or direction != GEOHAYSTACK)
):
index_list.insert(0, ("_cls", 1))
if index_list:
spec["fields"] = index_list
return spec
@classmethod
def _unique_with_indexes(cls, namespace=""):
"""Find unique indexes in the document schema and return them."""
unique_indexes = []
for field_name, field in cls._fields.items():
sparse = field.sparse
# Generate a list of indexes needed by uniqueness constraints
if field.unique:
unique_fields = [field.db_field]
# Add any unique_with fields to the back of the index spec
if field.unique_with:
if isinstance(field.unique_with, str):
field.unique_with = [field.unique_with]
# Convert unique_with field names to real field names
unique_with = []
for other_name in field.unique_with:
parts = other_name.split(".")
# Lookup real name
parts = cls._lookup_field(parts)
name_parts = [part.db_field for part in parts]
unique_with.append(".".join(name_parts))
# Unique field should be required
parts[-1].required = True