[IMP] sale: enhance product listing and display on sales/purchase forms

custom_sale_purchase_display/__init__.py

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+from . import models

custom_sale_purchase_display/__manifest__.py

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+{
+    'name': 'Sale Order Product History',
+    'version': '1.0',
+    'category': 'Sales',
+    'depends': ['sale_management', 'stock', 'purchase'],
+    'data': [
+        'views/purchase_order_form.xml',
+        'views/sale_order_form_view.xml',
+        'views/product_template_kanban_catalog.xml',
+    ],
+    'installable': True,
+    'application': False,
+    'license': 'LGPL-3'
+}

custom_sale_purchase_display/models/__init__.py

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+from . import sale_order
+from . import product_product
+from . import product_template

custom_sale_purchase_display/models/product_product.py

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+from odoo import models, fields, api
+
+
+class ProductProduct(models.Model):
+    _inherit = 'product.product'
+
+    # Computed field showing the latest invoice date for this product (context-sensitive)
+    last_invoice_date = fields.Date(
+        string="Last Invoice Date",
+        compute="_compute_last_invoice_date",
+        store=False
+    )
+
+    # Computed field showing time difference from today to last invoice date
+    last_invoice_time_diff = fields.Char(
+        string="Last Invoice Time Diff",
+        compute="_compute_last_invoice_time_diff",
+        store=False
+    )
+
+    def _compute_last_invoice_date(self):
+        for product in self:
+            partner_id = self.env.context.get('sale_order_partner_id') or self.env.context.get('purchase_order_partner_id')
+            if partner_id:
+                domain = [
+                    ('partner_id', '=', partner_id),
+                    ('state', '=', 'posted'),
+                    ('invoice_date', '!=', False),
+                    ('line_ids.product_id', '=', product.id)
+                ]
+                if self.env.context.get('sale_order_partner_id'):
+                    domain += [('move_type', '=', 'out_invoice')]
+                else:
+                    domain += [('move_type', '=', 'in_invoice')]
+                move = self.env['account.move'].search(domain, order='invoice_date desc', limit=1)
+                product.last_invoice_date = move.invoice_date if move else False
+            else:
+                # Fallback: search globally for latest sales invoice
+                domain = [
+                    ('move_type', '=', 'out_invoice'),
+                    ('state', '=', 'posted'),
+                    ('invoice_date', '!=', False),
+                    ('line_ids.product_id', '=', product.id)
+                ]
+                move = self.env['account.move'].search(domain, order='invoice_date desc', limit=1)
+                product.last_invoice_date = move.invoice_date if move else False
+
+    def _compute_last_invoice_time_diff(self):
+        for product in self:
+            if product.last_invoice_date:
+                diff = fields.Date.today() - product.last_invoice_date
+                days = diff.days
+                if days > 365:
+                    product.last_invoice_time_diff = f"{days // 365}y ago"
+                elif days > 30:
+                    product.last_invoice_time_diff = f"{days // 30}mo ago"
+                elif days > 7:
+                    product.last_invoice_time_diff = f"{days // 7}w ago"
+                elif days > 0:
+                    product.last_invoice_time_diff = f"{days}d ago"
+                else:
+                    product.last_invoice_time_diff = "today"
+            else:
+                product.last_invoice_time_diff = False
+
+    @api.model
+    def _get_recent_sales(self, partner_id):
+        if not partner_id:
+            return []
+        domain = [
+            ('partner_id', '=', partner_id),
+            ('move_type', '=', 'out_invoice'),
+            ('state', '=', 'posted'),
+            ('invoice_date', '!=', False)
+        ]
+        moves = self.env['account.move'].search(domain)
+        recent_sales = []
+        seen_products = set()
+        for move in moves.sorted(key=lambda m: m.invoice_date, reverse=True):
+            for line in move.line_ids:
+                pid = line.product_id.id
+                if pid and pid not in seen_products:
+                    recent_sales.append({'pid': pid, 'date': move.invoice_date})
+                    seen_products.add(pid)
+        return recent_sales
+
+    @api.model
+    def _get_recent_purchases(self, partner_id):
+        if not partner_id:
+            return []
+        domain = [
+            ('partner_id', '=', partner_id),
+            ('move_type', '=', 'in_invoice'),
+            ('state', '=', 'posted'),
+            ('invoice_date', '!=', False)
+        ]
+        moves = self.env['account.move'].search(domain)
+        recent_purchases = []
+        seen_products = set()
+        for move in moves.sorted(key=lambda m: m.invoice_date, reverse=True):
+            for line in move.line_ids:
+                pid = line.product_id.id
+                if pid and pid not in seen_products:
+                    recent_purchases.append({'pid': pid, 'date': move.invoice_date})
+                    seen_products.add(pid)
+        return recent_purchases
+
+    @api.model
+    def _format_time_diff(self, date_input):
+        date = date_input.get('date') if isinstance(date_input, dict) else date_input
+        if not date:
+            return ""
+        diff = fields.Date.today() - date
+        days = diff.days
+        if days > 365:
+            return f"{days // 365}y ago"
+        if days > 30:
+            return f"{days // 30}mo ago"
+        if days > 7:
+            return f"{days // 7}w ago"
+        if days > 0:
+            return f"{days}d ago"
+        return "today"
+
+    @api.model
+    def name_search(self, name="", args=None, operator="ilike", limit=100):
+        args = args or []
+        sale_partner_id = self.env.context.get('sale_order_partner_id')
+        purchase_partner_id = self.env.context.get('purchase_order_partner_id')
+        partner_id = sale_partner_id or purchase_partner_id
+        if not partner_id:
+            return super().name_search(name, args, operator, limit)
+
+        # Get product history data
+        if sale_partner_id:
+            history_data = self._get_recent_sales(partner_id)
+        else:
+            history_data = self._get_recent_purchases(partner_id)
+
+        if not history_data:
+            return super().name_search(name, args, operator, limit)
+
+        # Sort product IDs based on most recent usage
+        sorted_history = sorted(history_data, key=lambda x: x['date'], reverse=True)
+        product_ids_ordered = [item['pid'] for item in sorted_history]
+        history_map = {item['pid']: item for item in sorted_history}
+
+        # Prioritize search based on historical relevance
+        domain = [('product_variant_ids.id', 'in', product_ids_ordered), ('name', operator, name)] + args
+        prioritized_products = self.search(domain).sorted(
+            key=lambda p: product_ids_ordered.index(p.product_variant_id.id if p.product_variant_id else p.id)
+        )
+
+        results = []
+        prioritized_ids = []
+        for product in prioritized_products:
+            item = history_map.get(product.id)
+            time_str = self._format_time_diff(item) if item else ""
+            display_name = f"{product.display_name} ⏱ {time_str}" if time_str else product.display_name
+            results.append((product.id, display_name))
+            prioritized_ids.append(product.id)
+
+        # Include additional matching products if under limit
+        other_limit = limit - len(results)
+        if other_limit > 0:
+            domain = [('id', 'not in', prioritized_ids), ('name', operator, name)] + args
+            other_products = self.search(domain, limit=other_limit)
+            results.extend([(p.id, p.display_name) for p in other_products])
+
+        return results

custom_sale_purchase_display/models/product_template.py

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+from odoo import models, fields, api
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    # Related fields to show recent invoice data for a product variant (read-only)
+    last_invoice_date = fields.Date(
+        string="Last Invoice Date",
+        related='product_variant_id.last_invoice_date',
+        store=False
+    )
+
+    last_invoice_time_diff = fields.Char(
+        string="Last Invoice Time Diff",
+        related='product_variant_id.last_invoice_time_diff',
+        store=False
+    )
+
+    # Helper field to get the main variant of the template (used in searching/mapping)
+    product_variant_id = fields.Many2one(
+        'product.product',
+        compute='_compute_product_variant_id',
+        store=True,
+        index=True
+    )
+
+    @api.model
+    def name_search(self, name="", args=None, operator="ilike", limit=100):
+        args = args or []
+        # Get customer/vendor ID from context
+        partner_id = self.env.context.get('sale_order_partner_id') or self.env.context.get('purchase_order_partner_id')
+        if not partner_id:
+            return super().name_search(name, args, operator, limit)
+
+        # Fetch recent product interaction history based on context
+        if self.env.context.get('sale_order_partner_id'):
+            history_data = self.env['product.product']._get_recent_sales(partner_id)
+        else:
+            history_data = self.env['product.product']._get_recent_purchases(partner_id)
+
+        if not history_data:
+            return super().name_search(name, args, operator, limit)
+
+        # Build a lookup of product ID to history entry
+        history_map = {item['pid']: item for item in history_data}
+        variant_ids = list(history_map.keys())
+        # Find related product templates from those variants
+        templates = self.env['product.product'].browse(variant_ids).mapped('product_tmpl_id')
+
+        # Prioritize templates based on history order
+        domain = [('id', 'in', templates.ids), ('name', operator, name)] + args
+        prioritized_templates = templates.search(domain).sorted(
+            key=lambda t: min(
+                [history_data.index(d) for d in history_data if d['pid'] in t.product_variant_ids.ids]
+                or [len(history_data)]
+            )
+        )
+
+        results = []
+        for tmpl in prioritized_templates:
+            variant_id = tmpl.product_variant_id.id if tmpl.product_variant_ids else False
+            item = history_map.get(variant_id)
+            # Add time difference if available to display name
+            time_str = self.env['product.product']._format_time_diff(item) if item else ""
+            display_name = f"{tmpl.display_name} ⏱ {time_str}" if time_str else tmpl.display_name
+            results.append((tmpl.id, display_name))
+
+        # If results are fewer than limit, append others that matched but not in history
+        other_limit = limit - len(results)
+        if other_limit > 0:
+            domain = [('id', 'not in', prioritized_templates.ids), ('name', operator, name)] + args
+            other_templates = self.search(domain, limit=other_limit)
+            results.extend([(t.id, t.display_name) for t in other_templates])
+
+        return results