Aplikasi catat jual-beli saham: Odoo 17 + Postgres 16 + addon saat_invest

- docker-compose.yml: odoo:17.0 (port 8069) + postgres:16 (internal, no publish)
- Addon saat_invest: model saat.saham / saat.transaksi / saat.portofolio
  - P/L computed (realized FIFO, unrealized dari harga_sekarang)
  - action_recalculate() endpoint untuk Flutter
  - seed 5 saham IDX (BBRI, TLKM, BBCA, ASII, PTBA)
- JSON-RPC end-to-end terverifikasi: create beli/jual -> recalculate -> portfolio
  (avg_cost 4525, realized 65000, unrealized 220000, nilai 3840000)
- PLAN.md: rancangan disetujui Bozz
- Login Odoo admin/admin (ganti password master di .env, jangan commit)

addons/saat_invest/models/portofolio.py

@@ -0,0 +1,98 @@
+# -*- coding: utf-8 -*-
+from odoo import api, fields, models
+
+
+class SaatPortofolio(models.Model):
+    """Ringkasan posisi per saham, dihitung dari seluruh transaksi.
+
+    Bukan stored-view melainkan snapshot yang direkalkulasi dari transaksi
+    (via action_recalculate / API). Satu record per saham yang pernah
+    ditransaksikan. Menyimpan aggregate terakhir + P/L realised/unrealised.
+    """
+    _name = 'saat.portofolio'
+    _description = "Portofolio Saham"
+    _rec_name = 'saham_id'
+
+    saham_id = fields.Many2one('saat.saham', string="Saham", required=True, ondelete='cascade')
+    # Posisi agregat
+    total_beli_lembar = fields.Integer(string="Total Beli (lembar)", default=0)
+    total_beli_biaya = fields.Monetary(string="Total Beli (biaya)", default=0.0, currency_field='currency_id')
+    total_jual_lembar = fields.Integer(string="Total Jual (lembar)", default=0)
+    total_jual_hasil = fields.Monetary(string="Total Jual (hasil)", default=0.0, currency_field='currency_id')
+    sisa_lembar = fields.Integer(string="Sisa Lembar", compute='_compute_sisa', store=True)
+    avg_cost = fields.Monetary(string="Avg Cost/Lembar", compute='_compute_avg', store=True, currency_field='currency_id')
+    harga_sekarang = fields.Monetary(string="Harga Sekarang/Lembar", currency_field='currency_id')
+    nilai_sekarang = fields.Monetary(
+        string="Nilai Sekarang", compute='_compute_nilai', store=True, currency_field='currency_id')
+    realized_pl = fields.Monetary(
+        string="Realized P/L", currency_field='currency_id')
+    unrealized_pl = fields.Monetary(
+        string="Unrealized P/L", compute='_compute_pl', store=True, currency_field='currency_id')
+    currency_id = fields.Many2one('res.currency', string="Mata Uang", default=lambda self: self.env.company.currency_id)
+
+    _sql_constraints = [
+        ('portofolio_saham_uniq', 'unique(saham_id)', "Sudah ada portofolio untuk saham ini."),
+    ]
+
+    # --- aggregate helper (dijalankan saat rekalkulasi) ---
+    def action_recalculate(self):
+        """Rekalkulasi semua posisi portofolio dari transaksi. Return dict ringkas."""
+        self.env['saat.portofolio'].search([]).unlink()
+        trans = self.env['saat.transaksi'].search([], order='tanggal, id')
+        per_saham = {}
+        for t in trans:
+            a = per_saham.setdefault(t.saham_id.id, {
+                'saham': t.saham_id, 'beli_lb': 0, 'beli_by': 0.0,
+                'jual_lb': 0, 'jual_hl': 0.0, 'moves': [], 'tot_cost': 0.0,
+            })
+            a['moves'].append(t)
+            if t.tipe == 'buy':
+                a['beli_lb'] += t.volume
+                a['beli_by'] += t.total
+            else:
+                a['jual_lb'] += t.volume
+                a['jual_hl'] += t.total  # total sudah termasuk fee (keluar)
+
+        portfolios = self.env['saat.portofolio']
+        for sid, a in per_saham.items():
+            # FIFO realized P/L sederhana: realized saat sell = jual - (avg cost beli * volume terjual)
+            # avg cost beli per lembar:
+            avg_beli = (a['beli_by'] / a['beli_lb']) if a['beli_lb'] else 0.0
+            lembar_terjual = min(a['jual_lb'], a['beli_lb'])
+            realized = (a['jual_hl'] - avg_beli * lembar_terjual) if lembar_terjual else 0.0
+            sisa = max(a['beli_lb'] - a['jual_lb'], 0)
+            portfolios.create({
+                'saham_id': sid,
+                'total_beli_lembar': a['beli_lb'],
+                'total_beli_biaya': a['beli_by'],
+                'total_jual_lembar': a['jual_lb'],
+                'total_jual_hasil': a['jual_hl'],
+                'harga_sekarang': a['saham']._get_last_harga() if hasattr(a['saham'], '_get_last_harga') else 0.0,
+                'realized_pl': realized,
+            })
+        return {
+            'portofolio_ids': portfolios.ids,
+            'count': len(portfolios),
+        }
+
+    # --- computed store fields ---
+    @api.depends('total_beli_lembar', 'total_jual_lembar')
+    def _compute_sisa(self):
+        for r in self:
+            r.sisa_lembar = max((r.total_beli_lembar or 0) - (r.total_jual_lembar or 0), 0)
+
+    @api.depends('total_beli_biaya', 'total_beli_lembar')
+    def _compute_avg(self):
+        for r in self:
+            r.avg_cost = (r.total_beli_biaya / r.total_beli_lembar) if r.total_beli_lembar else 0.0
+
+    @api.depends('sisa_lembar', 'harga_sekarang')
+    def _compute_nilai(self):
+        for r in self:
+            r.nilai_sekarang = (r.sisa_lembar or 0) * (r.harga_sekarang or 0.0)
+
+    @api.depends('harga_sekarang', 'avg_cost', 'sisa_lembar')
+    def _compute_pl(self):
+        for r in self:
+            r.unrealized_pl = ((r.harga_sekarang or 0.0) - (r.avg_cost or 0.0)) * (r.sisa_lembar or 0)
+            # realized dihitung di action_recalculate (dibawa via currency) — simpan sisa