Dockerfile run python command not working - django

Question

I have a dockerfile like this:
FROM python:3
ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
ADD requirements.txt /code/
ADD reports /code/
RUN pip install -r requirements.txt
ADD . /code/
RUN ls -l /code/reports/report/manage.py # gives expected result
RUN ls -l /code/reports/build_static/ # gives expected result
RUN python /code/reports/report/manage.py build full_report.views.RenderView # does not work
Everything works fine except for the last command which runs a python package (django-bakery) through manage.py build. I don't get any errors.
This command should output some files inside build_static directory in the container.
If I ssh into the container and run the command manually then it is working. I inserted the full path with /code/ to make sure that they match and created all necessary directories beforehand.
This is how I build the container:
docker-compose run django /bin/bash
This is my docker-compose:
version: '3'
services:
django:
build: .
volumes:
- .:/code
ports:
- "8000:8000"
I wonder how come it is working when I run the command manually through bash inside the container, but not working with the command in the dockerfile.
Thanks!
Update (it seems that the files are created, but then if I check on them they aren't there):
Step 12/12 : RUN ls -l /code/reports/build_static/
---> Running in e294563d26d5
total 11080
-rw-r--r-- 1 root root 11339956 Apr 30 10:53 index.html
drwxr-xr-x 7 root root 4096 Apr 30 10:53 static
Removing intermediate container e294563d26d5
---> b8e72da8ee5c
Successfully built b8e72da8ee5c
Successfully tagged image_django:latest
WARNING: Image for service django was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
root#7483853ecc45:/code# ls -l reports/build_static/
total 0

Answer 1

Try following steps and let me know output:
FROM python:3
ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
ADD requirements.txt /code/
ADD reports /code/
RUN pip install -r requirements.txt
ADD . /code/
RUN ls -l /code/reports/report/manage.py # gives expected result
RUN ls -l /code/reports/build_static/ # gives expected result
RUN python /code/reports/report/manage.py build full_report.views.RenderView
RUN ls -l /code/reports/build_static/ # should give you expected list of files
Give me output for the last step.
I'll help you out based on output.

Answer 2

The following Dockerfile, copies your current directory content to a code folder (if it doesn't exist, it creates it), then sets it as the workdir.
The WORKDIR instruction sets the working directory for any RUN, CMD,
ENTRYPOINT, COPY and ADD instructions that follow it in the Dockerfile
Then, in order to reduce you docker image size to the maximum, we regroup all your commands in one RUN command so that it reduces the number of layers.
FROM python:3
ENV PYTHONUNBUFFERED 1
COPY . /code
WORKDIR /code
RUN pip install -r requirements.txt && \
ls -l reports/report/manage.py && \
ls -l reports/build_static/ && \
python reports/report/manage.py build full_report.views.RenderView
I haven't tried it with a full Django app example, but it should help you narrow down the problem !