Model class reference

This document covers features of the Model class.

Model

class data_migrator.models.base.Model(**kwargs)

Model is foundation for every transformation.

Each non-abstract Model class must have a BaseManager instance added to it. data-migrator ensures that in your model class you have at least a standard SimpleManager specified, on case you do add your own specialization of BaseManager through the Meta class manager attribute.

objects

reference to manager

emit(escaper=None)

output and escape this object instance to a dict.

Returns:object transfored according to field definitions Return type:map

Note

HiddenFields are not emitted

classmethod json_schema()

generate the json schema representation of this model.

Returns:dict with python representation of json schema.

save()

Save this object and add it to the list.

Returns:self, so that methods can be chained

scan(row)

scan model from row based on field definition scanners.

Returns:self, so that methods can be chained

update(**kwargs)

Update method for chaining operations.

Returns:self, so that methods can be chained Raises:DataException – raised if trying to set non defined field and strict model.

ModelBase

class data_migrator.models.base.ModelBase

Metaclass for all models.

Note

the model structure is the foundation of data-migrator and is taken from Django (https://github.com/django/django)