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cosi2 : A Lino Così for Belgium (FR)¶
This page contains code snippets (lines starting with >>>), which are
being tested during our development workflow. The following
snippet initializes the demo project used throughout this page.
>>> from lino_book.projects.cosi2.startup import *
>>> ses = rt.login('robin')
Used in miscellaneous tested documents, e.g.
Miscellaneous¶
Because invoicing is not installed for cosi2.
lino_xl.lib.trading.InvoiceItem.invoiceable is a dummy field,
which we can see by testing whether field is None.
>>> settings.SITE.with_assets
False
>>> print(rt.models.trading.InvoiceItem.invoiceable.field)
None
Slave tables with more than 15 rows¶
When you look at the detail window of Belgium in Lino Così then you see a list of all places in Belgium. This demo database contains exactly 48 entries:
>>> be = countries.Country.objects.get(isocode="BE")
>>> be.place_set.count()
48
>>> countries.PlacesByCountry.create_request(be).get_total_count()
48
>>> test_client.force_login(rt.login('robin').user)
>>> url = '/api/countries/PlacesByCountry?fmt=json&start=0&mt=5&mk=BE'
>>> res = test_client.get(url, REMOTE_USER='robin')
>>> print(res.status_code)
200
>>> result = json.loads(res.content.decode('utf-8'))
>>> print(len(result['rows']))
15
The 15 is because Lino has a hard-coded default value of returning only 15 rows when no limit has been specified.
In versions after 2013-09-03 you can change that limit
for a given table by overriding the
preview_limit
parameter of your table definition.
Or you can change it globally for all your tables
by setting the
preview_limit
Site attribute to either None or some bigger value.
This parameter existed before but wasn’t tested. In your code this would simply look like this:
class PlacesByCountry(Places):
preview_limit = 30
Here we override it on the living object:
>>> countries.PlacesByCountry.preview_limit = 25
Same request returns now 25 data rows:
>>> res = test_client.get(url, REMOTE_USER='robin')
>>> result = json.loads(res.content.decode('utf-8'))
>>> print(len(result['rows']))
25
To remove the limit altogether, you can say:
>>> countries.PlacesByCountry.preview_limit = None
and the same request now returns all 49 data rows:
>>> res = test_client.get(url,REMOTE_USER='robin')
>>> result = json.loads(res.content.decode('utf-8'))
>>> print(len(result['rows']))
49
Invoices to emit¶
The cosi2 demo project showcases an approach used e.g. in petrol stations where customers pay upon delivery when they fill their tank, they want to have a single invoice at the end of the month where every delivery is mentioned, and the station is legally required to book their purchases and sales of petrol every day. Some customers have the privilege of needing to pay only at the end of the month when they receive the invoice.
Lino helps to manage this kind of situations by using an accounting concept called factures à établir. The site owner writes a single daily invoice to a fictive customer “Invoices to emit”. This daily invoice causes VAT to get booked and the daily turnover to sync with sales and purchases. At the end of the month we then send the actual invoices to the customers. These invoices don’t report about our business activity, they are only informative, we call them “informal”, they list the deliveries of the last month and just book the total turnover from “Invoices to emit” to the real customer.
Payment term A means: this is just an informative invoice and the customer has already paid upon delivery.
>>> obj = trading.VatProductInvoice.objects.filter(payment_term__ref="A").first()
>>> obj
VatProductInvoice #198 ('SLS 9/2023')
>>> rt.show(accounting.MovementsByVoucher, obj)
================== ===== ================= ============ ============ ================ =========
Account Car Partner Debit Credit Match Cleared
------------------ ----- ----------------- ------------ ------------ ---------------- ---------
(4000) Customers Hans Flott & Co 815,96 **SLS 9/2023** Yes
(4000) Customers Hans Flott & Co 815,96 **SLS 9/2023** Yes
**815,96** **815,96**
================== ===== ================= ============ ============ ================ =========
Payment terms B means: this is just an informative invoice regarding VAT, but the customer still has to pay.
>>> obj = rt.models.trading.VatProductInvoice.objects.filter(payment_term__ref="B").first()
>>> obj
VatProductInvoice #199 ('SLS 10/2023')
>>> obj.payment_term.informal
True
>>> obj.payment_term.payer
Company #83 ('Invoices to emit')
>>> rt.show(accounting.MovementsByVoucher, obj)
=========================== ===== =========================== ============ ============ ================= =========
Account Car Partner Debit Credit Match Cleared
--------------------------- ----- --------------------------- ------------ ------------ ----------------- ---------
(4000) Customers Bernd Brechts Bücherladen 320,00 **SLS 10/2023** No
(4800) Internal clearings Invoices to emit 320,00 **SLS 10/2023** No
**320,00** **320,00**
=========================== ===== =========================== ============ ============ ================= =========
The customer “Invoices to emit” is used to record internal clearing of invoices that have been paid at delivery. TODO: add monthly transaction in the demo fixture to balance the invoices to emit.
>>> obj = contacts.Company.objects.get(name="Invoices to emit")
>>> obj
Company #83 ('Invoices to emit')
>>> rt.show(accounting.MovementsByPartner, obj, display_mode="grid")
============ ===================== ================================================================================================== ======= ============== ============= =========
Value date Voucher Description Debit Credit Match Cleared
------------ --------------------- -------------------------------------------------------------------------------------------------- ------- -------------- ------------- ---------
11/02/2025 `SLS 11/2025 <…>`__ `(4800) Internal clearings <…>`__ | `Adriencense Alexine <…>`__ | `Invoices to emit <…>`__ 645,00 SLS 11/2025 No
14/12/2024 `SLS 57/2024 <…>`__ `(4800) Internal clearings <…>`__ | `Bernd Brechts Bücherladen <…>`__ | `Invoices to emit <…>`__ 740,00 SLS 57/2024 No
10/07/2024 `SLS 29/2024 <…>`__ `(4800) Internal clearings <…>`__ | `Boulanger Abdul Azeez <…>`__ | `Invoices to emit <…>`__ 279,90 SLS 29/2024 No
10/04/2024 `SLS 19/2024 <…>`__ `(4800) Internal clearings <…>`__ | `Booghmans Philomène <…>`__ | `Invoices to emit <…>`__ 320,00 SLS 19/2024 No
13/02/2024 `SLS 8/2024 <…>`__ `(4800) Internal clearings <…>`__ | `Blondeel Théophile <…>`__ | `Invoices to emit <…>`__ 740,00 SLS 8/2024 No
07/12/2023 `SLS 54/2023 <…>`__ `(4800) Internal clearings <…>`__ | `Bauwens Isabeau <…>`__ | `Invoices to emit <…>`__ 770,00 SLS 54/2023 No
07/10/2023 `SLS 43/2023 <…>`__ `(4800) Internal clearings <…>`__ | `Arimont Gaston <…>`__ | `Invoices to emit <…>`__ 600,00 SLS 43/2023 No
09/07/2023 `SLS 32/2023 <…>`__ `(4800) Internal clearings <…>`__ | `Alloo Béranger <…>`__ | `Invoices to emit <…>`__ 670,00 SLS 32/2023 No
09/05/2023 `SLS 21/2023 <…>`__ `(4800) Internal clearings <…>`__ | `Adriencense Alexine <…>`__ | `Invoices to emit <…>`__ 990,00 SLS 21/2023 No
07/03/2023 `SLS 10/2023 <…>`__ `(4800) Internal clearings <…>`__ | `Bernd Brechts Bücherladen <…>`__ | `Invoices to emit <…>`__ 320,00 SLS 10/2023 No
**Balance -6074.90 (10 movements)** **6 074,90**
============ ===================== ================================================================================================== ======= ============== ============= =========
Costs by car¶
>>> obj = cars.Car.objects.all().first()
>>> obj
Car #1 ('Alfa Romeo ')
>>> rt.show(accounting.MovementsByProject, obj)
============ ===================== ============================================= ============ ======== ================= =========
Value date Voucher Description Debit Credit Match Cleared
------------ --------------------- --------------------------------------------- ------------ -------- ----------------- ---------
09/10/2024 `SLS 47/2024 <…>`__ `(4000) Customers <…>`__ / `Bestbank <…>`__ 600,00 **SLS 47/2024** No
**Balance 600.00 (1 movements)** **600,00**
============ ===================== ============================================= ============ ======== ================= =========
Explaining the extra cent¶
Here is an invoice with quite precise quantities and unit prices, and with discount amounts. Don’t worry about the product name “Wooden table”, it doesn’t matter, we just needed a product with 21% VAT rate.
>>> obj = rt.models.trading.VatProductInvoice.objects.filter(journal__ref="SLS").last()
>>> obj
VatProductInvoice #320 ('SLS 16/2025')
>>> print(obj.total_base)
96.85
>>> print(obj.total_vat)
20.34
>>> print(obj.total_incl)
117.19
>>> rt.show(accounting.MovementsByVoucher, obj)
...
================== ===== ============== ============ ============ ================= =========
Account Car Partner Debit Credit Match Cleared
------------------ ----- -------------- ------------ ------------ ----------------- ---------
(7000) Sales 96,85 Yes
(4510) VAT due 20,34 Yes
(4000) Customers Adriaen Aimé 117,19 **SLS 16/2025** No
**117,19** **117,19**
================== ===== ============== ============ ============ ================= =========
>>> rt.show(trading.ItemsByInvoice, obj,
... column_names="product qty unit_price discount_amount total_incl total_base total_vat ")
...
==================== =========== ======== ========== ============== ============= =============
Product Qty UPr Discount TotIncl TotExcl VAT
-------------------- ----------- -------- ---------- -------------- ------------- -------------
Wooden table 30.94 1,5860 2,01 47,0600 38,8926 8,1674
Wooden table 44.19 1,6520 2,87 70,1300 57,9587 12,1713
**Total (2 rows)** **75.13** **4,88** **117,1900** **96,8513** **20,3387**
==================== =========== ======== ========== ============== ============= =============
Everything is okay, except that in TIM the same operation results in a total base of 96.84 instead of 96.85. One cent less. Why? A test in TIM shows that even TIM would get 96.85 if we manually enter an invoice with these amounts. The difference comes because the original invoice in TIM had been generated from delivery notes and using a customized method for computing the discount. So the VAT amounts in the lines of the invoice differ slightly from what TIM itself would make them. This is why tim2lino
Désignation Qté p.unit TVAC HTVA MontTVA V
──────────────────────┬──────┬──────────┬──────────┬──────────┬──────────┬──
Euro Super │ 30.94│ 1.586│ 49.07│ 40.5544│ 8.5164│F
Rabatt │ 0.00│0 │ -2.01│ -1.6612│ -0.3488│F
Euro Super │ 44.19│ 1.652│ 73.00│ 60.3321│ 12.6697│F
Rabatt │ 0.00│0 │ -2.87│ -2.3719│ -0.4981│F
TOTAL : │ │ │ 117.19│ 96.85│ 20.3392│