[ADD] Print contract annex using btn 'Print Invoice' from invoice form

i18n/ru.po

@@ -6,8 +6,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Odoo Server 11.0-20191106\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-03-05 13:43+0000\n"
-"PO-Revision-Date: 2020-03-05 13:43+0000\n"
+"POT-Creation-Date: 2020-03-18 13:42+0000\n"
+"PO-Revision-Date: 2020-03-18 13:42+0000\n"
 "Last-Translator: Stepan Savelyev\n"
 "Language-Team: RYDLAB\n"
 "MIME-Version: 1.0\n"
@@ -577,6 +577,11 @@ msgstr "Срок монтажа изделий"
 msgid "Institutional-Legal Form"
 msgstr "Огранизационно-правовая форма"
 
+#. module: client_contracts
+#: model:ir.model,name:client_contracts.model_account_invoice
+msgid "Invoice"
+msgstr "Счёт"
+
 #. module: client_contracts
 #: model:res.partner.contract.field,name:client_contracts.contract_field_partner_kpp
 #: model:res.partner.contract.field,name:client_contracts.contract_field_seller_kpp
@@ -613,11 +618,6 @@ msgstr "Последний раз обновил"
 msgid "Last Updated on"
 msgstr "Последнее обновление"
 
-#. module: client_contracts
-#: model:ir.model,name:client_contracts.model_crm_lead
-msgid "Lead/Opportunity"
-msgstr "Лид / Потенциальная сделка"
-
 #. module: client_contracts
 #: model:ir.ui.view,arch_db:client_contracts.res_partner_contract_annex_view_form
 msgid "Leave empty for compute"
@@ -881,26 +881,12 @@ msgid "Print Form of Contract"
 msgstr "Форма печати договора"
 
 #. module: client_contracts
+#: code:addons/client_contracts/models/account_invoice.py:31
 #: code:addons/client_contracts/models/res_partner_contract_annex.py:110
 #, python-format
 msgid "Print Form of Contract Annex"
 msgstr "Форма печати приложения к договору"
 
-#. module: client_contracts
-#: model:ir.model,name:client_contracts.model_res_partner_template_print
-msgid "Print Template"
-msgstr "Шаблон печати"
-
-#. module: client_contracts
-#: model:ir.model,name:client_contracts.model_res_partner_template_print_contract
-msgid "Print Template Contract"
-msgstr "Вложение-шаблон договора"
-
-#. module: client_contracts
-#: model:ir.model,name:client_contracts.model_res_partner_template_print_annex
-msgid "Print Template Contract Annex"
-msgstr "Вложение-шаблон приложения к договору"
-
 #. module: client_contracts
 #: selection:res.partner.document.template,company_type:0
 msgid "Private Limited Company"
@@ -911,6 +897,11 @@ msgstr "Общество с ограниченной ответственнос
 msgid "Quotation"
 msgstr "Оферта"
 
+#. module: client_contracts
+#: model:ir.model.fields,field_description:client_contracts.field_res_partner_contract_res_model
+msgid "Related Document Model Name"
+msgstr "Related Document Model Name"
+
 #. module: client_contracts
 #: model:ir.ui.view,arch_db:client_contracts.res_partner_contract_form
 msgid "Renew"
@@ -1055,6 +1046,12 @@ msgstr "Тип шаблона"
 msgid "Templates"
 msgstr "Шаблоны"
 
+#. module: client_contracts
+#: code:addons/client_contracts/models/account_invoice.py:20
+#, python-format
+msgid "There is no binding contract. It is necessary to link the order with the annex to the contract."
+msgstr "Отсутствует связанный договор. Необходимо связать заказ с приложением к договору."
+
 #. module: client_contracts
 #: model:ir.model.fields,help:client_contracts.field_res_partner_name_write
 #: model:ir.model.fields,help:client_contracts.field_res_users_name_write

models/__init__.py

@@ -1,3 +1,4 @@
+from . import account_invoice
 from . import res_partner
 from . import res_partner_contract
 from . import res_partner_contract_annex

models/account_invoice.py

@@ -0,0 +1,41 @@
+from odoo import models, _
+from odoo.exceptions import UserError
+from ..utils import MODULE_NAME
+
+
+class AccountInvoice(models.Model):
+    _inherit = "account.invoice"
+
+    def invoice_print(self):
+        self.ensure_one()
+        for so in self.env["sale.order"].search([]):
+            if self.id in so.invoice_ids.ids:
+                order = so
+                break
+        else:
+            return super().invoice_print()
+
+        if not order.contract_annex_id or not order.contract_annex_id.contract_id:
+            raise UserError(
+                _(
+                    "There is no binding contract. It is necessary to link the order with the annex to the contract."
+                )
+            )
+
+        self.sent = True
+
+        view = self.env.ref(
+            "{}.res_partner_wizard_print_document_view".format(MODULE_NAME)
+        )
+        return {
+            "name": _("Print Form of Contract Annex"),
+            "type": "ir.actions.act_window",
+            "res_model": "res.partner.contract.wizard",
+            "view_mode": "form",
+            "view_id": view.id,
+            "target": "new",
+            "context": {
+                "self_id": order.contract_annex_id.id,
+                "active_model": "res.partner.contract.annex",
+            },
+        }