Hello. Thank you for contacting the Toolset support.
Basically, the form should hold the fields for the post type for which form is set to create/edit the entry.
I do not know what is the reason you want to add the relationship field to your form. Is the field belongs to parent or child post type in relationship? what is the reaosn you want to add the relationship field to your form? what are your post types and what is the relationship between them.
This is a post form. It create a CPT 'News Article. In the post form, I need users to easily and in one place and time, create the News Article and also make relationships to the CPT 'Author Curator', the CPT 'Schools of Thought' and several other CPTs, which I will add later. Right now I put in category selectors just for the mockup.
I really need to put 'post relation' custom fields in their place to do the work, relations are definitely the way to go.
I see author creator and schoold of thoughts fields already available or do you mean that you want to add custom field that is belongs to CPT 'Author Curator' or the CPT 'Schools of Thought'?
What is the relationship between CPT 'News Article' and CPT 'Author Curator' or the CPT 'Schools of Thought'?
In the picture you see the 'post reference' field. Toolset treats that different from a 'relationship': Views filter and display according to 'relationships' that are already created, or 'post reference' fields. So, is there a way to put not a 'post reference' field on to a post form, but a 'relationship'? ... Note that Toolset also creates relationships, on the front end, through 'Relationship Forms.' In a word, can we combine them - can we, so to speak, put a 'relationship form' into a 'post form'?
But for example - you have created one-to-many relationship between State (one) and Cities (Many).
So, lets say if you created the form for your child post type Cities and create a post form for this post type the parent field (State) will be available to connect the city to state.
