Pfthb

I'm running Docker to load my Django project locally. Pytest works perfectly without Docker, but since I am using Docker, running the command in my container bash brings back lot's of errors.

My docker-compose

version: '3'

 services:
 db:
 image: postgres
 ports:
 - "5432:5432"
 web:
 build: .
 env_file: .env
 volumes:
 - .:/code
 ports:
 - "8000:8000"
 depends_on:
 - db
 container_name: local

Dockerfile

# Pull base image
FROM python:3

# Set environment varibles
ENV PYTHONUNBUFFERED 1

# Set work directory
RUN mkdir /code
WORKDIR /code

# Install dependencies
RUN pip install --upgrade pip
RUN pip install pipenv
COPY ./Pipfile /code/Pipfile
RUN pipenv install --deploy --system --skip-lock --dev

# Define ENTRYPOINT
COPY ./docker-entrypoint.sh /docker-entrypoint.sh
RUN chmod +x /docker-entrypoint.sh
ENTRYPOINT ["/docker-entrypoint.sh"]

# Copy project
COPY . /code/

My initial thought is that docker doesn't let pytest create the test database. Did you ever had issues with that and can tell me how to fix it?

Console log with failures >

You have omitted the most important part of the exceptions, but based on the errors I'm guessing you haven't run your database migrations due to which the Postgres database does not have the necessary tables for the tests.

What container image are you using to run the python code? (it seems to be missing from your compose file).

Based on the deprecation warnings it seems your calling a method that does not exist (i.e. callable is None). Are all dependencies installed in your container?

Additionally, do you have a DockerFile available that installs all dependencies?

Something like:

# Use an official Python runtime as a parent image
FROM python:3.6-slim

# Set the working directory to /app
WORKDIR /app

# copy requirements.txt
ADD ./requirements.txt /app/requirements.txt

# Install any needed packages specified in requirements.txt
RUN pip install --trusted-host pypi.python.org -r requirements.txt

# Copy the current directory contents into the container at /app
ADD . /app

And then in the compose file you could build it like this:

web:
 build:
 context: ./
 dockerfile: /path/to/Dockerfile
 command: cd /app/path/to/where/pytest/should/be/executed && pytest

Note that this answer does not rely on a host-mounted volume, but rather copies your code into the container, and creates an image that can be used everywhere.