Add modules stock_user_default_warehouse_base, stock_user_default_warehouse_purchase and stock_user_default_warehouse_sale

stock_user_default_warehouse_purchase/__init__.py

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+# -*- coding: utf-8 -*-
+
+from . import purchase

stock_user_default_warehouse_purchase/__manifest__.py

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+# -*- coding: utf-8 -*-
+# © 2017 Akretion (http://www.akretion.com)
+# @author Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+{
+    'name': 'Default Warehouse on User (Purchase)',
+    'version': '10.0.1.0.0',
+    'category': 'Purchases',
+    'license': 'AGPL-3',
+    'summary': "Use the users's default warehouse on purchase orders",
+    'description': """
+Default Warehouse on User (Purchase)
+====================================
+
+The default warehouse configured in the preferences of the user will be used by default for the picking type on purchase orders.
+
+This module has been written by Alexis de Lattre from Akretion
+<alexis.delattre@akretion.com>.
+    """,
+    'author': 'Akretion',
+    'website': 'http://www.akretion.com',
+    'depends': ['purchase', 'stock_user_default_warehouse_base'],
+    'installable': True,
+}

stock_user_default_warehouse_purchase/purchase.py

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+# -*- coding: utf-8 -*-
+# © 2017 Akretion (http://www.akretion.com)
+# @author Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import models, fields, api
+
+
+class PurchaseOrder(models.Model):
+    _inherit = 'purchase.order'
+
+    @api.model
+    def _default_pref_picking_type(self):
+        default_in_type = self.env.user.context_default_warehouse_id.in_type_id
+        if default_in_type:
+            return default_in_type.id
+        return self._default_picking_type
+
+    picking_type_id = fields.Many2one(default=_default_pref_picking_type)