[16.0][IMP] contract: Added domain for pricelist_id

  Using domain for field "pricelist_id" which lists
pricelist whose currency is matched with journal_id
currency. This domain helps to avoid using different
currency within same contract.

Author: anusriNPS

contract/models/abstract_contract.py

@@ -23,7 +23,15 @@ class ContractAbstractContract(models.AbstractModel):
     partner_id = fields.Many2one(
         comodel_name="res.partner", string="Partner", index=True
     )
-    pricelist_id = fields.Many2one(comodel_name="product.pricelist", string="Pricelist")
+    pricelist_id_domain = fields.Binary(
+        compute="_compute_pricelist_id_domain", readonly=True, store=False
+    )
+    pricelist_id = fields.Many2one(
+        comodel_name="product.pricelist",
+        string="Pricelist",
+        compute="_compute_pricelist_id",
+        store=True,
+    )
     contract_type = fields.Selection(
         selection=[("sale", "Customer"), ("purchase", "Supplier")],
         default="sale",
@@ -80,3 +88,21 @@ def _compute_journal_id(self):
                 contract.journal_id = journal.id
             else:
                 contract.journal_id = None
+
+    @api.depends("journal_id")
+    def _compute_pricelist_id_domain(self):
+        for rec in self:
+            rec.pricelist_id_domain = (
+                [("currency_id", "=", rec.journal_id.currency_id.id)]
+                if rec.journal_id.currency_id
+                else []
+            )
+
+    @api.depends("journal_id")
+    def _compute_pricelist_id(self):
+        for rec in self:
+            if (
+                rec.journal_id.currency_id
+                and rec.journal_id.currency_id != rec.pricelist_id.currency_id
+            ):
+                rec.pricelist_id = None

contract/views/contract.xml

@@ -105,6 +105,7 @@
                     <group name="main">
                         <group>
                             <field name="commercial_partner_id" invisible="1" />
+                            <field name="pricelist_id_domain" invisible="1" />
                             <field
                                 name="partner_id"
                                 required="1"
@@ -113,6 +114,7 @@
                             <field
                                 name="pricelist_id"
                                 attrs="{'readonly': [('is_terminated','=',True)]}"
+                                domain="pricelist_id_domain"
                             />
                             <field
                                 name="payment_term_id"