I am trying to create a 1on 1 relationship between two post types, also trying to create new child posts by the Create child post link by "Set the parent according to the currently displayed content"
I got two issues
1. since I set the relationship as 1 on 1, I think that 1 parent post has one child post only, but I can add new posts again
2. except connecting the existing relationship post from the backend manually, I submitted posts cannot be connected with the parent post created. that means the relationship can't be passed through URL?
Last time, I wanted to use chat online, so didn't provide access information, just take this ticket please and ignore that ticket I just posted https://toolset.com/forums/topic/parent-relationship-can-not-inherited-according-to-url/
please see the
hidden link to submit a parent post
you can see the child form here hidden link
also, you can check the parent and child post types here from back-end
hidden link parent post type
hidden link child post type.
hidden link relationship setting
你好，
感谢你提供的详细信息，我可以登录上你的网站，吃完午饭以后回来回复你，对于这样的在线约课系统，我觉得你的网站设置不是太合理。
好的 谢谢回复，我是想要跟Learndash连在一起，learndadh没有约课系统，所以我做一个 这个是从你们的Demo里面抄来的，只是随便放在页面上 主要是看看能不能取到用户信息，之后可能要做一些其他的工作----比如根据个人资料页的国家时差显示不同的时间等等。最后还要跟Event calendar 连到一起， 这个我看到Toolset系统可以实现，论坛里有先例。如果你有什么建议，麻烦告诉我 非常感谢！?
1) 关于第一个问题“ I think that 1 parent post has one child post only, but I can add new posts again”， Toolset 子文章表单，是用于One-to-Many关系的， 参考我们的文档：
https://toolset.com/documentation/post-relationships/selecting-parent-posts-using-forms-create-child-items/
它并不能对限制One-to-One关系做限制，你在可以添加一个feature request：
https://toolset.com/forums/forum/professional-support/#feature-request
目前有个变通的办法，你可以添加一个view：
- 查询“1on1”文章
- 限制和偏移：
显示1篇项目
- 查询过滤器:
选择一对一课程组 上课人组关系中的文章that are related to the Post where this View is shown.
- "循环编辑器"
在简码[wpv-no-items-found] ... [/wpv-no-items-found]显示子表单链接，比如
[wpv-no-items-found]
<p>[cred_child_link_form form='36' parent_id='-1' text='去预约' target='_self' class='btn btn-primary']</p>
[/wpv-no-items-found]
参考：
hidden link
然后将上面的view放到“上课人组”模板上：
hidden link
你可以在这里测试：
hidden link
如果没有子项目，则显示“去预约”按钮，如果有子项目，则像是子项目。
2) 关于第二个问题“ the relationship can't be passed through URL”， 这个是你设置的表单有问题：
hidden link
你需要添加一个parent selector field, 比如：
<label>一对一课程</label>
[cred_field field='@1o1-scheduler.parent' class='form-control' output='bootstrap' select_text='--- 未设置 ---']
然后再测试，比如打开页面：
hidden link
点击“去预约”按钮，转到页面
hidden link
你应该可以看到“测试预约1”已经被选中，然后你可以通过CSS代码将这个parent selector隐藏掉，用户提交给表单，可以正常保存文章之间的关系。
参考我们的文档：
https://toolset.com/documentation/post-relationships/selecting-parent-posts-using-forms-create-child-items/
