如何在Flask中显示类对象列表

Question

我有一个Python列表，列表里的每个元素都是一个类的对象：

message = [
    <File(tar_file:appstream-glib-0.1.5.tar.xz, filename:/appstream-glib-0.1.5/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>, 
    <File(tar_file:totem-3.12.1.tar.xz, filename:/totem-3.12.1/build-aux/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:gvfs-1.20.2.tar.xz, filename:/gvfs-1.20.2/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:gnome-software-3.12.2.tar.xz, filename:/gnome-software-3.12.2/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:gnome-packagekit-3.12.2.tar.xz, filename:/gnome-packagekit-3.12.2/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:gnome-color-manager-3.12.2.tar.xz, filename:/gnome-color-manager-3.12.2/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:gnome-chess-3.12.2.tar.xz, filename:/gnome-chess-3.12.2/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:gnome-power-manager-3.12.2.tar.xz, filename:/gnome-power-manager-3.12.2/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:evolution-mapi-3.12.2.tar.xz, filename:/evolution-mapi-3.12.2/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:cockpit-0.7.tar.bz2, filename:/cockpit-0.7/tools/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:xf86-video-freedreno-1.1.0.tar.bz2, filename:/xf86-video-freedreno-1.1.0/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>, 
    <File(tar_file:elfutils-0.159.tar.bz2, filename:/elfutils-0.159/config/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>,
    <File(tar_file:ibus-table-1.5.0.20140519.tar.gz, filename:/ibus-table-1.5.0.20140519/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>, 
    <File(tar_file:fence-agents-4.0.9.tar.xz, filename:/fence-agents-4.0.9/config.guess, sha256:4a86808b907403ad6801c0661a4524dfa07c0b898a2cef6e7fa0cf82a09b9c53)>
]

列表中每个元素的类型是 -> 类 summershum.model.File

我想通过Flask把这个列表作为响应返回，并在本地显示它的内容，但什么都没有显示。

我现在是这样做的：

return flask.Response(
        response=message,
    )

那正确的做法是什么呢？

Answer 1

这就是你通常从视图返回对象到模板的方法：

在你的视图方法中：

@app.route('/files')
def display_files():
    '''code to retrieve list of file objects'''
    return render_template('files.html', all_files=all_files)

然后在你的模板文件中，你可以这样访问 all_files：

  {% for a_file in all_files %}
      {{ a_file.tar_file }}
  {% endfor %}

关于flask模板的文档可以在 这里 找到