[ADD]mrp_bom_line_sequence

mrp_bom_line_sequence/models/__init__.py

@@ -0,0 +1,3 @@
+# -*- coding: utf-8 -*-
+
+from . import mrp

mrp_bom_line_sequence/models/mrp.py

@@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 Eficent Business and IT Consulting Services S.L.
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from odoo import api, fields, models
+
+
+class MrpBomLine(models.Model):
+    _inherit = 'mrp.bom.line'
+
+    # re-defines the field to change the default
+    sequence = fields.Integer(default=9999)
+
+    # displays sequence on the stock moves
+    sequence2 = fields.Integer(help="Shows the sequence in the BOM line.",
+                               related='sequence', readonly=False, store=True)
+
+    @api.model
+    def create(self, values):
+        move = super(MrpBomLine, self).create(values)
+        # We do not reset the sequence if we are copying a complete bom
+        if not self.env.context.get('keep_line_sequence', False):
+            move.bom_id._reset_sequence()
+        return move
+
+
+class MrpBom(models.Model):
+    _inherit = 'mrp.bom'
+
+    @api.multi
+    @api.depends('bom_line_ids')
+    def _compute_max_line_sequence(self):
+        """Allow to know the highest sequence entered in move lines.
+        Then we add 1 to this value for the next sequence, this value is
+        passed to the context of the o2m field in the view.
+        So when we create new move line, the sequence is automatically
+        incremented by 1. (max_sequence + 1)
+        """
+        for bom in self:
+            bom.max_line_sequence = (
+                max(bom.mapped('bom_line_ids.sequence') or [0]) + 1
+                )
+
+    max_line_sequence = fields.Integer(string='Max sequence in lines',
+                                       compute='_compute_max_line_sequence')
+
+    @api.multi
+    def _reset_sequence(self):
+        for rec in self:
+            current_sequence = 1
+            for line in rec.bom_line_ids:
+                line.sequence = current_sequence
+                current_sequence += 1
+
+    @api.multi
+    def copy(self, default=None):
+        return super(MrpBom,
+                     self.with_context(keep_line_sequence=True)).copy(default)