Domain and Model

Model

In Epure, Model class represents table and your decorated by @epure() class from db perspective.

Model of a class can be accessed through the .md field

Accessing .dom, .md fields and .get_model() method

.dom, .md fields and .get_model() method can be only accessed in method of "epurized" class, decorated by @escript function. Read more about @escript here

You can get ColumnProxy objects by accessing fields of Model

Through ColumnProxy object you then can create all kinds of queries. Read more about examples and methods of ColumnProxy that are used with @escript decorator here

Getting ColumnProxy field from Model

from epure import escript, epure

@epure
class MyEpureCls:
    int_field:int 
...

...
@escript
def method_to_get_model(self):
    my_epure_cls_model = self.md # This will return Model of MyEpureCls

    my_epure_cls_model.int_field # This will return ColumnProxy of int_field field
...

.get_model() method

.get_model() is a simple and easy way to get the Model object of class using instance of this class e.g.:

Getting Model object with .get_model() method

The more convinient way if you have instance of Class

from epure import escript, epure

@epure
class MyEpureCls:
...

...
@escript
def method_to_get_model(self):
    my_epure_cls_model = self.get_model(MyEpureCls) # This will return Model object
...

Domain

Domain comes from the idea of "DDD" or Domain Driven Design, in Epure, Domain represents object of DataBase and can be accessed through the .dom field

Accessing .dom, .md fields and .get_model() method

.dom, .md fields and .get_model() method can be only accessed in method of "epurized" class, decorated by @escript function. Read more about @escript here

You can dynamically interact with Domain object by getting Models from it.

Getting Model object from Domain

The more convinient way if you have instance of Class

from epure import escript, epure

@epure
class MyEpureCls:
...

...
@escript
def method_to_get_model(self):
    my_epure_cls_model = self.get_model(MyEpureCls) # This will return Model object
...

Or if you know the table name of Model which you want to get

...
@escript
def method_using_dom_field(self):
    dom_object = self.dom # This will return Domain object
    my_epure_cls_model = self.dom.my_epure_cls
...