Pydantic Classes Generator#

This code generator produces Pydantic classes, which represent the entities and relationships of a B-UML model. These Pydantic classes can be utilized by other code generators to generate code that uses Pydantic classes, such as REST API Generator and Backend Generator.

Let’s generate the code for the Pydantic classes of our Structural model example B-UML model example. You should create a PydanticGenerator object, provide the B-UML model, and use the generate method as follows:

from besser.generators.Pydantic_classes import PydanticGenerator

generator: PydanticGenerator = Pydantic_Generator(model=library_model)
generator.generate()

Upon executing this code, a pydantic_classes.py file containing the Pydantic models will be generated. in the <<current_directory>>/output folder and it will look as follows.

 1from datetime import datetime, date
 2from typing import List, Optional, Union, Set
 3from enum import Enum
 4from pydantic import BaseModel
 5
 6
 7############################################
 8# Enumerations are defined here
 9############################################
10
11############################################
12# Classes are defined here
13############################################
14class AuthorCreate(BaseModel):
15    name: str
16    email: str
17    publishes: List[int]
18
19class LibraryCreate(BaseModel):
20    address: str
21    name: str
22
23class BookCreate(BaseModel):
24    title: str
25    pages: int
26    release: date
27    writtenBy: List[int]
28    locatedIn: int  # N:1 Relationship