How to reflect ImageField in Django + Docker (pillow)

Introduction

In this article, I would like to write about the error that I actually suffered when reflecting "Image Field" through a solution.

kadaikun.Image.image: (fields.E210) Cannot use ImageField because Pillow is not installed.HINT: Get Pillow at https://pypi.org/project/Pillow/ or run command "pip install Pillow" At first I was plagued by this error. I installed pillow, but I was told that it was not installed and it was in a "?" State. For the time being, I tried to deal with it with the following command.

terminal


$ python3 -m pip uninstall pillow

$ python3 -m pip install pillow

And my great.

terminal


$ python manage.py migrate

result...

terminal


kadaikun.Image.image: (fields.E210) Cannot use ImageField because Pillow is not installed.
        HINT: Get Pillow at https://pypi.org/project/Pillow/ or run command "pip install Pillow"

It was bad....

At this time, I realized that I was using Docker ...

This was my first time using Docker, so I only knew if I should change the "Dockerfile" or "requirementes.txt".

For that reason, I wrote everything that came out googled into the Dockerfile from one end and repeated "docker-compose up" all the time.

/bin/sh: 1: apk: not found

The result of repeating ...

terminal


/bin/sh: 1: apk: not found

I just got an error and it didn't solve at all.

Meanwhile, I finally found an article that seems to be solved.

That is this article. A place stuck with Docker + django

In a Dockerfile like this article

Dockerfile


RUN pip install pillow

In "equirementes.txt",

equirementes.txt:equirementes.txt


Pillow==7.2.0

Enter.

Then type in the terminal as follows:

terminal


$ python manage.py makemigrations

$ python manage.py migrate

$ docker-compose up

That's it! I'd like to say, but I got an error when I opened the browser ...

OperationalError Despite the error, this solution was easy.

terminal


$ rm -d -r db.sqlite3
$ rm -d -r app/migrations/*
$ python manage.py migrate

This is OK!

Finally

terminal


$ docker-compose up

If you type in, it should be reflected beautifully.

By the way, here is the article I referred to.

django.db.utils.OperationalError: no such column: app_action.author_id error when opening web page ](https://teratail.com/questions/87239)

Finally

This time I wrote about the error I experienced. I will post an article about Djnago in the future, so I hope it will be helpful.

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