Python constants.QUERY_TERMS属性代码示例

# 需要导入模块: from django.db.models.sql import constants [as 别名]
# 或者: from django.db.models.sql.constants import QUERY_TERMS [as 别名]
def lookup_needs_distinct(opts, lookup_path):
    """
    Return True if 'distinct()' should be used to query the given lookup path.
    """
    lookup_fields = lookup_path.split(LOOKUP_SEP)
    # Remove the last item of the lookup path if it is a query term
    if lookup_fields[-1] in QUERY_TERMS:
        lookup_fields = lookup_fields[:-1]
    # Now go through the fields (following all relations) and look for an m2m
    for field_name in lookup_fields:
        if field_name == 'pk':
            field_name = opts.pk.name
        field = opts.get_field(field_name)
        if hasattr(field, 'get_path_info'):
            # This field is a relation, update opts to follow the relation
            path_info = field.get_path_info()
            opts = path_info[-1].to_opts
            if any(path.m2m for path in path_info):
                # This field is a m2m relation so we know we need to call distinct
                return True
    return False 

# 需要导入模块: from django.db.models.sql import constants [as 别名]
# 或者: from django.db.models.sql.constants import QUERY_TERMS [as 别名]
def lookup_needs_distinct(opts, lookup_path):
    """
    Returns True if 'distinct()' should be used to query the given lookup path.
    """
    lookup_fields = lookup_path.split(LOOKUP_SEP)
    # Remove the last item of the lookup path if it is a query term
    if lookup_fields[-1] in QUERY_TERMS:
        lookup_fields = lookup_fields[:-1]
    # Now go through the fields (following all relations) and look for an m2m
    for field_name in lookup_fields:
        if field_name == 'pk':
            field_name = opts.pk.name
        field = opts.get_field(field_name)
        if hasattr(field, 'get_path_info'):
            # This field is a relation, update opts to follow the relation
            path_info = field.get_path_info()
            opts = path_info[-1].to_opts
            if any(path.m2m for path in path_info):
                # This field is a m2m relation so we know we need to call distinct
                return True
    return False 

# 需要导入模块: from django.db.models.sql import constants [as 别名]
# 或者: from django.db.models.sql.constants import QUERY_TERMS [as 别名]
def lookup_needs_distinct(opts, lookup_path):
    """
    Returns True if 'distinct()' should be used to query the given lookup path.
    """
    lookup_fields = lookup_path.split('__')
    # Remove the last item of the lookup path if it is a query term
    if lookup_fields[-1] in QUERY_TERMS:
        lookup_fields = lookup_fields[:-1]
    # Now go through the fields (following all relations) and look for an m2m
    for field_name in lookup_fields:
        field = opts.get_field(field_name)
        if hasattr(field, 'get_path_info'):
            # This field is a relation, update opts to follow the relation
            path_info = field.get_path_info()
            opts = path_info[-1].to_opts
            if any(path.m2m for path in path_info):
                # This field is a m2m relation so we know we need to call distinct
                return True
    return False 

# 需要导入模块: from django.db.models.sql import constants [as 别名]
# 或者: from django.db.models.sql.constants import QUERY_TERMS [as 别名]
def lookup_allowed(self, lookup, value):
        model = self.model
        # Check FKey lookups that are allowed, so that popups produced by
        # ForeignKeyRawIdWidget, on the basis of ForeignKey.limit_choices_to,
        # are allowed to work.
        for l in model._meta.related_fkey_lookups:
            for k, v in widgets.url_params_from_lookup_dict(l).items():
                if k == lookup and v == value:
                    return True

        parts = lookup.split(LOOKUP_SEP)

        # Last term in lookup is a query term (__exact, __startswith etc)
        # This term can be ignored.
        if len(parts) > 1 and parts[-1] in QUERY_TERMS:
            parts.pop()

        # Special case -- foo__id__exact and foo__id queries are implied
        # if foo has been specificially included in the lookup list; so
        # drop __id if it is the last part. However, first we need to find
        # the pk attribute name.
        rel_name = None
        for part in parts[:-1]:
            try:
                field = model._meta.get_field(part)
            except FieldDoesNotExist:
                # Lookups on non-existants fields are ok, since they're ignored
                # later.
                return True
            if hasattr(field, 'rel'):
                model = field.rel.to
                rel_name = field.rel.get_related_field().name
            elif is_related_field(field):
                model = field.model
                rel_name = model._meta.pk.name
            else:
                rel_name = None
        if rel_name and len(parts) > 1 and parts[-1] == rel_name:
            parts.pop()

        if len(parts) == 1:
            return True
        clean_lookup = LOOKUP_SEP.join(parts)
        return clean_lookup in self.list_filter 

# 需要导入模块: from django.db.models.sql import constants [as 别名]
# 或者: from django.db.models.sql.constants import QUERY_TERMS [as 别名]
def lookup_allowed(self, lookup, value):
        # Check FKey lookups that are allowed, so that popups produced by
        # ForeignKeyRawIdWidget, on the basis of ForeignKey.limit_choices_to,
        # are allowed to work.
        for l in self.model._meta.related_fkey_lookups:
            for k, v in widgets.url_params_from_lookup_dict(l).items():
                if k == lookup and v == value:
                    return True

        parts = lookup.split(LOOKUP_SEP)

        # Last term in lookup is a query term (__exact, __startswith etc)
        # This term can be ignored.
        if len(parts) > 1 and parts[-1] in QUERY_TERMS:
            parts.pop()

        # Special case -- foo__id__exact and foo__id queries are implied
        # if foo has been specifically included in the lookup list; so
        # drop __id if it is the last part. However, first we need to find
        # the pk attribute name.
        rel_name = None
        for part in parts[:-1]:
            try:
                field, _, _, _ = self.model._meta.get_field_by_name(part)
            except FieldDoesNotExist:
                # Lookups on non-existent fields are ok, since they're ignored
                # later.
                return True
            if hasattr(field, 'rel'):
                if field.rel is None:
                    # This property or relation doesn't exist, but it's allowed
                    # since it's ignored in ChangeList.get_filters().
                    return True
                model = field.rel.to
                rel_name = field.rel.get_related_field().name
            elif isinstance(field, ForeignObjectRel):
                model = field.model
                rel_name = model._meta.pk.name
            else:
                rel_name = None
        if rel_name and len(parts) > 1 and parts[-1] == rel_name:
            parts.pop()

        if len(parts) == 1:
            return True
        clean_lookup = LOOKUP_SEP.join(parts)
        return clean_lookup in self.list_filter