[IMP] tg_account: duplicate the invoice dates and instruction improvements (#108)

* [IMP] tg_account: copy the Invoice date and Invoice due date upon duplication

* [FIX] tg_account: improve the module documentation

Author: ilmir-k

tg_account/README.rst

@@ -3,29 +3,39 @@
 ==============================================
 
 * Removes "Recipient Bank" from invoice report template
+* Allows to duplicate the invoice(s) by linking them to another company according
+  to predefined mappings
+
 
 Duplicate to fiscal invoice
 ---------------------------
 
 - Login as admin
-- Enable developers mode
-- Settings -> Users -> Groups
+- Enable the developers mode
+- Go to Settings -> Users -> Groups menu
 - Search for "Show Full Accounting Features" and open record
 - Add admin user to this group
-- Settings -> Users -> Groups
+- Go to Settings -> Users -> Groups menu
 - Search for "Multi Companies" and open record
 - Add admin user to this group
 
-- Open any company form (Settings -> Users -> Company). Let is be "Company 1"
-- In company form set fiscal company. For example "Company 2"
-- In "Fiscal Company Mappings" add mappings
+- Open any company form (in Settings -> Users -> Company menu). Let's call it
+  "Company 1"
+- In the company form set a so-called fiscal company. For example "Company 2"
+- In the "Fiscal Company Mappings" tab add mappings for:
+
+  - Journals
+  - Accounts
+  - Taxes
+  - Payment Terms
+
 - Save
 
-- In company switcher choose "Company 1" and add tick on "Company 2"
-- Open or create any customer invoice, that is related to "Company 1"
+- In the company switcher choose "Company 1" and add tick on "Company 2"
+- Open or create any customer invoice that is related to "Company 1"
 - Make sure, that there are some products/services in "Invoice lines"
-- Actions -> "Duplicate to fiscal invoice"
-- RESULT: invoice related to "Company 2" is created
+- Click on Actions -> "Duplicate to fiscal invoice"
+- RESULT: The invoice related to the "Company 2" is created according to the mappings
 
 Credits
 =======
@@ -34,6 +44,7 @@ Contributors
 ------------
 
 * `Eugene Molotov <https://github.com/em230418>`__
+* `Ilmir Karamov <https://github.com/ilmir-k>`__
 
 Sponsors
 --------

tg_account/models/account_move.py

@@ -97,6 +97,8 @@ def copy_data(self, default=None):
         JournalMappings = self.sudo().env["res.company.fiscal.mapping.journal"]
         BankAccountMappings = self.sudo().env["res.company.fiscal.mapping.bank.account"]
         PaymentTermMappings = self.sudo().env["res.company.fiscal.mapping.payment.term"]
+        invoice_date = self.invoice_date
+        invoice_date_due = self.invoice_date_due
 
         for move, data in zip(self, data_list, strict=False):
             data["company_id"] = fiscal_company_id
@@ -136,4 +138,8 @@ def copy_data(self, default=None):
 
             data["partner_bank_id"] = new_bank_account.id
 
+            data["invoice_date"] = invoice_date
+
+            data["invoice_date_due"] = invoice_date_due
+
         return data_list