Explanations on Repeatable Groups

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Hi,
as I clearly understand the Group concept in forms, I would have more explanations about Repeated Groups, as the wiki is not fully detailed on this subject :

1. do you have some samples to understand the concept ?
2. how is structured the database table ? I suppose that it is necessary to have the group max fields created (and empty by default)
   Repeat groups are a way to collapse Form presentation ?

Thanks

 

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Friendly bump

 

[rob]

Repeat groups are for storing data in related database tables.
Each row of data in a repeat group is stored in a row in the repeat groups's own db table.

So say I have a list countries, joined to a list regions and the regions group is set to repeating.
Each region you enter in the countries form is store in its own row with a reference to its country id. The reference is defined by the fields you enter in the list joins section.

I suppose that it is necessary to have the group max fields created (and empty by default)

Its not needed to be filled in

Repeat groups are a way to collapse Form presentation ?

Somewhat I guess, in that you can edit data from 2 db tables in one form.

 

[Incremental]

Thanks it's clear now

 

[Incremental]

Precisions added in the Wiki