Jinja2的url_for多個arguements jinja2.exceptions.TemplateSyntaxError：預計令牌「」，有‘：’

Question

我得到解析，當我試圖從神社模板多個參數傳遞錯誤：

jinja2.exceptions.TemplateSyntaxError：預計令牌 ''，有 '：'

@classmethod 
def follow_user(cls, followed_email, follower_email): 
    with CursorFromConnectionFromPool() as cursor: 
     cursor.execute('INSERT INTO connections(follower_id, followee_id) VALUES (%s, %s)', 
          (follower_email,followed_email)) 
@classmethod 
def unfollow_user(cls, followed_email, follower_email): 
    with CursorFromConnectionFromPool() as cursor: 
     cursor.execute("DELETE from connections WHERE follower_id = '{}' AND followee_id = '{}' ", 
          (follower_email, followed_email)) 

{% if is_following %} 
<a class="btn btn-danger" href="{{ url_for('user.unfollow_user',followed_email:followed.email,follower_email:follower_email) }}" role="button">Unfollow</a> 
{% else %} 
<a class="btn btn-success" href="{{url_for('user.follow_user',followed_email:followed.email,follower_email:follower_email) }}" role="button">Follow</a> 
{% endif %} 

Answer 1

這條線：

<a class="btn btn-danger" href="{{ url_for('user.unfollow_user',followed_email:followed.email,follower_email:follower_email) }}" role="button">Unfollow</a> 

<a class="btn btn-danger" href="{{ url_for('user.unfollow_user',followed_email=followed.email,follower_email=follower_email) }}" role="button">Unfollow</a> 

和在第二行也使用相同的「=」：應替換

<a class="btn btn-success" href="{{url_for('user.follow_user',followed_email=followed.email,follower_email=follower_email) }}" role="button">Follow</a> 

當將參數傳遞給參數url_for應該使用=。