Bug description
---------------
`account.analytic.contract.line` inherits
`account.analytic.invoice.line`
`account.analytic.invoice.line` defines field `analytic_account_id`:
- comodel='account.analytic.account'
`account.analytic.contract.line` redefines field `analytic_account_id`:
- comodel='account.analytic.contract'
On attempt to extend `account.analytic.invoice.line` model adding
field that depends on `analytic_account_id.date_start`
Odoo fails to update, because it adds this field to
`account.analytic.contract.line` through inheritance,
and `account.analytic.contract` model have no this field.
What is done
------------
Change inheritance order:
- `account.analytic.invoice.line` inherits
`account.analytic.contract.line`
- no file renames at this stage (this wil be done in next commit)
If you have contract lines with automatic price and your pricelist
contains different prices per quantity, the price is not changed
when computing quantity.
This PR fixes this.
=================================================
Variable quantity in contract recurrent invoicing
=================================================
With this module, you will be able to define in recurring contracts some
lines with variable quantity according a provided formula.
Configuration
=============
* Go to Sales > Configuration > Contracts > Formulas (quantity).
* Define any formula based on Python code that stores at some moment a
float/integer value of the quantity to invoice in the variable 'result'.
You can use these variables to compute your formula:
* *env*: Environment variable for getting other models.
* *context*: Current context dictionary.
* *user*: Current user.
* *line*: Contract recurring invoice line that triggers this formula.
* *contract*: Contract whose line belongs to.
* *invoice*: Invoice (header) being created.
Usage
=====
To use this module, you need to:
* Go to Sales -> Contracts and select or create a new contract.
* Check *Generate recurring invoices automatically*.
* Add a new recurring invoicing line.
* Select "Variable quantity" in column "Qty. type".
* Select one of the possible formulas to use (previously created).
