Django 找不到 Pillow，尽管它是使用 docker 安装的

Question

您好，我正在关注本教程链接。一切工作正常，但当我运行以下命令时，它说未找到枕头，但枕头已安装。

docker-compose -f docker-compose.prod.yml exec app python manage.py migrate --noinput

这是错误：

employee.Employee.image: (fields.E210) Cannot use ImageField because Pillow is not installed.

    HINT: Get Pillow at https://pypi.org/project/Pillow/ or run command "python -m pip install Pillow".

students.Student.image: (fields.E210) Cannot use ImageField because Pillow is not installed.

    HINT: Get Pillow at https://pypi.org/project/Pillow/ or run command "python -m pip install Pillow".

然后我再次尝试使用以下命令安装

docker-compose -f docker-compose.prod.yml exec app python -m pip install Pillow

它说枕头是 枕头已安装

Requirement already satisfied: Pillow in /usr/local/lib/python3.8/site-packages (6.2.1)

这是我的 docker 文件

###########

# BUILDER #

###########

# pull official base image

FROM python:3.8.3-alpine as builder

# set work directory

WORKDIR /usr/src/app

# set environment variables

ENV PYTHONDONTWRITEBYTECODE 1

ENV PYTHONUNBUFFERED 1

# install psycopg2 dependencies

RUN apk update \

    && apk add postgresql-dev gcc python3-dev zlib-dev jpeg-dev musl-dev

# lint

RUN pip install --upgrade pip

RUN pip install Pillow

COPY . .

# install dependencies

COPY ./requirements.txt .

RUN pip wheel --no-cache-dir --no-deps --wheel-dir /usr/src/app/wheels -r requirements.txt

#########

# FINAL #

#########

# pull official base image

FROM python:3.8.3-alpine

# create directory for the app user

RUN mkdir -p /home/app

# create the app user

RUN addgroup -S app && adduser -S app -G app

# create the appropriate directories

ENV HOME=/home/app

ENV APP_HOME=/home/app/web

RUN mkdir $APP_HOME

RUN mkdir $APP_HOME/staticfiles

RUN mkdir $APP_HOME/mediafiles

WORKDIR $APP_HOME

# install dependencies

RUN apk update && apk add libpq

COPY --from=builder /usr/src/app/wheels /wheels

COPY --from=builder /usr/src/app/requirements.txt .

RUN pip install --no-cache /wheels/*

Answer 1

在该部分下添加这两行FINAL，就在RUN apk update && apk add libpq# install pillow dependenciesRUN apk add --no-cache jpeg-dev zlib-devRUN apk add --no-cache --virtual .build-deps build-base linux-headers发生这种情况是因为创建映像后BUILDER删除了所需的依赖项。Pillow在FINAL图像中，Pillow可用，但其所需的依赖项不可用。

Answer 2

请尝试使用从小写 p 开始的“pillow”。

Answer 3

我遇到了同样的问题。将这些依赖项添加到 FINAL 部分解决了此问题# install pillow dependenciesRUN apk add --no-cache jpeg-dev zlib-dev \    fribidi-dev \    harfbuzz-dev \    lcms2-dev \    openjpeg-dev \    tcl-dev \    tiff-dev \    tk-dev