main.py 文件源码

def add_note():
    page_name = flask.request.args.get('page_name', 'default')
    note_title = flask.request.form['note_title']
    note_text = flask.request.form['note_text']

    parent = parent_key(page_name)

    choice = random.randint(0, 1)
    if choice == 0:
        # Use transactional function
        # [START calling]
        note_key = ndb.Key(Note, note_title, parent=parent)
        note = Note(key=note_key, content=note_text)
        # [END calling]
        if pick_random_insert(note_key, note) is False:
            return ('Already there<br><a href="%s">Return</a>'
                    % flask.url_for('main_page', page_name=page_name))
        return flask.redirect(flask.url_for('main_page', page_name=page_name))
    elif choice == 1:
        # Use get_or_insert, which is transactional
        note = Note.get_or_insert(note_title, parent=parent, content=note_text)
        if note.content != note_text:
            return ('Already there<br><a href="%s">Return</a>'
                    % flask.url_for('main_page', page_name=page_name))
        return flask.redirect(flask.url_for('main_page', page_name=page_name))