invoices & recurring invoices: add custom restrictions as properties

[jzarate]

add user-created restrictions to the invoice creation. These restrictions would apply to avoid enabling/activating a recurring invoice / Invoice if they are not fulfilled.

Say , for example, that you set the restriction that the "days to due" need to be always a greater than 0 quantity. In that case, you can not save a recurring invoice as "activated" until it has the "days to due" field greater than zero. (of course you can always save it de-activated, and the restriction wouldn't apply).

[jzarate]

one approax:

• a custom validator on the "enable/disable" checkbox. that validator checks against the other fields of the recurring, according to some user-defined restrictions defined as properties.

[jzarate]

I don't really see the point of this. Moving it to 0.3 and maybe rethinking it.

[jzarate]

no pint at all. closing it.