[IMP] l10n_in*: multi GSTIN Using journal

=======
Purpose
=======

    government rule that "GST registration should be obtained by a taxable person under GST in each of the State or Union Territory, from where the taxable supply of goods or services is made"
    So we managed this using journal
    User create journal and partner for other states
    After user can select journal in Sale order, Purchase order and warehouse

========
Solution
========

    -Add a field on the journal to define the GSTIN
    -Add sale and purchase journal field in warehouse
    -On the SO/PO, add the journal field and based on the warehouse journal it set automatically fill if warehouse journal is set.

task 1917619

2 files changed, 20 insertions, 2 deletions

diff --git a/addons/l10n_in/models/account.py b/addons/l10n_in/models/account.py
index b28d6a1ab33..eb10eced9b9 100644
--- a/addons/l10n_in/models/account.py
+++ b/addons/l10n_in/models/account.py
@@ -10,6 +10,22 @@ class AccountJournal(models.Model):
 
     # Use for filter import and export type.
     l10n_in_import_export = fields.Boolean("Import/Export", help="Tick this if this journal is use for Import/Export Under Indian GST.")
+    l10n_in_gstin_partner_id = fields.Many2one('res.partner', string="GSTIN", ondelete="restrict", help="GSTIN related to this journal. If empty then consider as company GSTIN.")
+
+    def name_get(self):
+        """
+            Add GSTIN number in name as suffix so user can easily find the right journal.
+            Used super to ensure nothing is missed.
+        """
+        result = super().name_get()
+        result_dict = dict(result)
+        indian_journals = self.filtered(lambda j: j.company_id.country_id.code == 'IN' and
+            j.l10n_in_gstin_partner_id and j.l10n_in_gstin_partner_id.vat)
+        for journal in indian_journals:
+            name = result_dict[journal.id]
+            name += "- %s" % (journal.l10n_in_gstin_partner_id.vat)
+            result_dict[journal.id] = name
+        return list(result_dict.items())
 
 
 class AccountMoveLine(models.Model):
diff --git a/addons/l10n_in/models/chart_template.py b/addons/l10n_in/models/chart_template.py
index 5fe711b4df7..39f3270b755 100644
--- a/addons/l10n_in/models/chart_template.py
+++ b/addons/l10n_in/models/chart_template.py
@@ -11,12 +11,14 @@ class AccountChartTemplate(models.Model):
         res = super(AccountChartTemplate, self)._prepare_all_journals(acc_template_ref, company, journals_dict=journals_dict)
         if self == self.env.ref('l10n_in.indian_chart_template_standard'):
             for journal in res:
+                if journal.get('type') in ('sale','purchase'):
+                    journal['l10n_in_gstin_partner_id'] = company.partner_id.id
                 if journal['code'] == 'INV':
                     journal['name'] = _('Tax Invoices')
 
             res += [
-                {'type': 'sale', 'name': _('Retail Invoices'), 'code': 'RETINV', 'company_id': company.id, 'show_on_dashboard': True,},
-                {'type': 'sale', 'name': _('Export Invoices'), 'code': 'EXPINV', 'company_id': company.id, 'show_on_dashboard': True, 'l10n_in_import_export': True}
+                {'type': 'sale', 'name': _('Retail Invoices'), 'code': 'RETINV', 'company_id': company.id, 'show_on_dashboard': True, 'l10n_in_gstin_partner_id': company.partner_id.id},
+                {'type': 'sale', 'name': _('Export Invoices'), 'code': 'EXPINV', 'company_id': company.id, 'show_on_dashboard': True, 'l10n_in_import_export': True, 'l10n_in_gstin_partner_id': company.partner_id.id}
             ]
         return res