Question

我的第一个问题，抱歉，如果有些事情...... 基本上我的面包屑发生器有问题 - 我传递一个类别的名称是一个查询列表，然后我将标签设置为一个空字符串，我放置一个标签，基本上只是一个字符串，但当我将它传递到相同的def时，它打印出来没有，我无法弄清楚为什么......任何帮助将不胜感激！这个问题不是重复的 - 返回是在正确的位置，它返回一个包含breadcrumbs标签的字符串，它意味着循环，直到它进入内部，然后返回执行后。

   def make_crumb(home, category):
        crumb_middle = ""
        crumb_end = category.category_name_url_friendly + '">' + category.category_name + '</a>'
        while not category.parent_category_id == 0:
            category = Category.query.filter(Category.id == category.parent_category_id).first()
            crumb_middle = category.category_name_url_friendly + '/' + crumb_middle
        crumb_done = home + crumb_middle + crumb_end
        print "crumb done", crumb_done
        return crumb_done


def parent_check(category, breadcrumbs=None, tags=None):
    print "tags", tags
    if not breadcrumbs:
        breadcrumbs = '<a itemprop="breadcrumb" href="https://dev.shopifymarketplace.com/">Home</a>'
    if not tags:
        tags = ""
    pointer = ' &#x21DB;'
    home = '<a itemprop="breadcrumb" href="https://dev.shopifymarketplace.com/categories/'
    # if only one level deep - add category name to home tag
    if category.parent_category_id == 0:
        crumb_done = pointer + home + category.category_name_url_friendly + '">' + category.category_name + '</a>'
        breadcrumbs += crumb_done + tags
    else:
        tags = pointer + make_crumb(home, category) + tags
        parent_check(Category.query.filter(Category.id == category.parent_category_id).first(), tags)
    return breadcrumbs

输出错误：

[Fri Nov 18 15:12:10.848261 2016] [:error] [pid 26720] tags None
[Fri Nov 18 15:12:10.855084 2016] [:error] [pid 26720] crumb done <a itemprop="breadcrumb" href="https://dev.shopifymarketplace.com/categories/art-photography/photo_frames/rectangle/square/gum_gum">gum gum</a>
[Fri Nov 18 15:12:10.856791 2016] [:error] [pid 26720] tags None
[Fri Nov 18 15:12:10.862042 2016] [:error] [pid 26720] crumb done <a itemprop="breadcrumb" href="https://dev.shopifymarketplace.com/categories/art-photography/photo_frames/rectangle/square">square</a>
[Fri Nov 18 15:12:10.864090 2016] [:error] [pid 26720] tags None
[Fri Nov 18 15:12:10.867533 2016] [:error] [pid 26720] crumb done <a itemprop="breadcrumb" href="https://dev.shopifymarketplace.com/categories/art-photography/photo_frames/rectangle">Rectangle</a>
[Fri Nov 18 15:12:10.869289 2016] [:error] [pid 26720] tags None
[Fri Nov 18 15:12:10.871102 2016] [:error] [pid 26720] crumb done <a itemprop="breadcrumb" href="https://dev.shopifymarketplace.com/categories/art-photography/photo_frames">Photo Frames</a>
[Fri Nov 18 15:12:10.872855 2016] [:error] [pid 26720] tags None

字符串返回为None，应该有内容

0 个答案: