sqlalchemy.orm SynonymProperty Example Code

SynonymProperty is a class within the sqlalchemy.orm module of the SQLAlchemy project.

ColumnProperty, CompositeProperty, Load, Mapper, Query, RelationshipProperty, Session, aliased, attributes, backref, class_mapper, column_property, composite, interfaces, mapper, mapperlib, object_mapper, object_session, query, relationship, session, sessionmaker, and strategies are several other callables with code examples from the same sqlalchemy.orm package.

Example 1 from marshmallow-sqlalchemy

marshmallow-sqlalchemy (project documentation) is a code library that makes it easier to use SQLAlchemy with the Marshmallow data serialization tool.

The marshmallow-sqlalchemy project is provided as open source under the MIT license.

marshmallow-sqlalchemy / src/marshmallow_sqlalchemy / convert.py

# convert.py
import inspect
import functools
import warnings

import uuid
import marshmallow as ma
from marshmallow import validate, fields
from sqlalchemy.dialects import postgresql, mysql, mssql
from sqlalchemy.orm import SynonymProperty
import sqlalchemy as sa

from .exceptions import ModelConversionError
from .fields import Related, RelatedList


def _is_field(value):
    return isinstance(value, type) and issubclass(value, fields.Field)


def _has_default(column):
    return (
        column.default is not None
        or column.server_default is not None
        or _is_auto_increment(column)
    )


def _is_auto_increment(column):
    return column.table is not None and column is column.table._autoincrement_column


def _postgres_array_factory(converter, data_type):
    return functools.partial(


## ... source file abbreviated to get to SynonymProperty examples ...


    @property
    def type_mapping(self):
        if self.schema_cls:
            return self.schema_cls.TYPE_MAPPING
        else:
            return ma.Schema.TYPE_MAPPING

    def fields_for_model(
        self,
        model,
        *,
        include_fk=False,
        include_relationships=False,
        fields=None,
        exclude=None,
        base_fields=None,
        dict_cls=dict,
    ):
        result = dict_cls()
        base_fields = base_fields or {}
        for prop in model.__mapper__.iterate_properties:
            key = self._get_field_name(prop)
            if self._should_exclude_field(prop, fields=fields, exclude=exclude):
                result[key] = None
                continue
            if isinstance(prop, SynonymProperty):
                continue
            if hasattr(prop, "columns"):
                if not include_fk:
                    for column in prop.columns:
                        if not column.foreign_keys:
                            break
                    else:
                        continue
            if not include_relationships and hasattr(prop, "direction"):
                continue
            field = base_fields.get(key) or self.property2field(prop)
            if field:
                result[key] = field
        return result

    def fields_for_table(
        self,
        table,
        *,
        include_fk=False,
        fields=None,
        exclude=None,
        base_fields=None,
        dict_cls=dict,


## ... source file continues with no further SynonymProperty examples...

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