Skip to main content
Python Software Foundation 20th Year Anniversary Fundraiser  Donate today!

Fill your database with mocked instances.

Project description

Fill your database with mocked instances.

Wrap you ORM model into a ModelWrapper, specify how your fields should look like and then generate how many instances you want of each model.


  • pip install fillmydb[peewee] if you plan to use it with peewee models
  • pip install fillmydb[django] if you plan to use it with djanog models (not implemented yet)
  • pip install fillmydb[sqlalchemy] if you plan to use it with sqlalchemy models (not implemented yet)

Usage with fake-factory

Generating instances for a single model:

import faker

factory = faker.Factory.create()

wrapper = ModelWrapper(TestModel)

wrapper[TestModel].client_name = FieldSpec(
wrapper[TestModel].description = FieldSpec(factory.text)
wrapper[TestModel].password_hash = FieldSpec(factory.binary, length=25)
wrapper[TestModel].email = FieldSpec(
wrapper[TestModel].visits = FieldSpec(factory.pyint)

item = wrapper.generate(100)

Generating instances for multipe models:

from tests.models import User, Post, Like
import faker

factory = faker.Factory.create()

wrapper = ModelWrapper(User, Like, Post)

wrapper[User].name = FieldSpec(
wrapper[User].username = FieldSpec(factory.user_name)
wrapper[User].description = FieldSpec(factory.text)
wrapper[User].password_hash = FieldSpec(factory.binary, length=25)
wrapper[User].email = FieldSpec(
wrapper[User].visits = FieldSpec(factory.pyint)

wrapper[Post].title = FieldSpec(lambda _: "test", 1)
wrapper[Post].text = FieldSpec(factory.text)

# generating 10 users, 100 likes and 20 posts
wrapper.generate(10, 100, 20)

General workflow


while models_to_process():
    model = get_next_model()

    if model.has_unresolved_dependency():

    # process model
    for _ in range(number_of_instances):
        for field in model.fields():
            # resolve_field(field)
            if field == ForeignKey:
                field = get_random_ref_model_instance()
                field = resolve_normal()

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for fillmydb, version 0.1.0
Filename, size File type Python version Upload date Hashes
Filename, size (22.1 kB) File type Dumb Binary Python version any Upload date Hashes View
Filename, size (9.6 kB) File type Source Python version None Upload date Hashes View

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring DigiCert DigiCert EV certificate Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page