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Non Negative Widget

by
Odoo

$ 35.00

v 18.0 Third Party
Availability
Odoo Online
Odoo.sh
On Premise
Lines of code 174
Technical Name evo_non_negative_widget
LicenseLGPL-3
Websitehttps://evozard.com/
Versions 16.0 17.0 18.0 19.0
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Availability
Odoo Online
Odoo.sh
On Premise
Lines of code 174
Technical Name evo_non_negative_widget
LicenseLGPL-3
Websitehttps://evozard.com/
Versions 16.0 17.0 18.0 19.0
EVOZARD Logo
Supports:
Community
Enterprise
Availability:
Odoo.sh
On Premise
Self-Hosted

Prevent Negative Values in Odoo Numeric Fields

Odoo 18 • Real-Time Integer & Float Field Validation

Stop users from entering negative quantities or amounts in Integer and Float fields with real-time validation and warning notifications - no backend changes required.

Odoo v18 Community & Enterprise Client-Side Validation Fully Responsive
Contact Support Request Customization

Zero Backend Changes Required

Lightweight client-side OWL widget validation - no Python model overrides needed. Works seamlessly across form views, editable list views, and one2many lines.

Key Highlights

Non-Negative Integer Widget

If the user types a negative number in an Integer field, the value is automatically reset to 0 and a warning notification is shown instantly.

Non-Negative Float Widget

Same protection for Float fields - supports decimal values and numpad input. Negative entries are corrected to 0.0 without disrupting user flow.

Smart Warning Notification

Warning toast appears only once per input session (debounced to 3 seconds), avoiding notification spam.

No "Invalid Fields" Odoo Error

Widget silently returns 0 instead of throwing a parse error - keeping the form saveable while still alerting the user.

No Backend Changes Required

Pure client-side OWL widget - apply non-negative constraints on any field without Python model overrides.

EASY

Works on All Editable Views

Compatible with form views, editable tree/list views, and embedded one2many lines across all Odoo modules.

Integer Field Validation

When a user enters a negative number in an Integer field, the widget immediately resets it to 0 and shows a warning toast.
Integer field before validation

Integer field - negative value entered

Integer field after validation

Integer field - auto-corrected to 0 with warning

Float Field Validation

Same behaviour for Float fields - negative decimal values are auto-corrected to 0.0 with the same warning notification.
Float field before validation

Float field - negative decimal entered

Float field after validation

Float field - auto-corrected to 0.0 with warning

Our Features

01

Non-Negative Integer Widget

02

Non-Negative Float Widget

03

Smart Warning Notification (Debounced)

04

No "Invalid Fields" Odoo Error

05

No Backend Override Required

06

Works on Form, List & One2many Views

07

Numpad & Decimal Input Supported

08

Odoo 16, 17, 18 & 19 Compatible

09

Compatible with Custom Modules

Frequent Questions

Yes, the app works perfectly with Odoo Enterprise (On-premise and Odoo.SH) as well as Community. Odoo Online (Cloud) does not allow installation of third-party apps.

Yes. The widgets can be used in any view type that supports editable fields - including form views, editable list views, and embedded one2many lines.

The widget silently corrects the value to 0 and displays a warning notification. The form remains fully saveable - there is no Odoo "Invalid Fields" error shown to the user.

Please contact us on Skype: evozard.consulting or email: support@evozard.com

Overview

This module prevents users from entering negative values in Integer and Float fields across all editable Odoo views. It uses lightweight OWL client-side widgets - no backend model changes required.

Best for: Inventory teams, sales & purchase departments, warehouse operations, manufacturing, and any Odoo developer needing reusable non-negative field validation.

Why Use This Module?

→Prevent accidental negative quantities in inventory
→Improve inventory and order accuracy
→Reduce common data-entry mistakes
→Better user validation experience with toast alerts
→Avoid backend validation complexity
→Works across all editable Odoo views

This Application is Suitable For

Inventory, Sales & Purchase Teams Businesses where quantities must always remain positive in stock adjustments, sales, or purchase orders.
Odoo Developers Enforce non-negative constraints on any Integer or Float field without any backend model changes.
Manufacturing & Warehouse Teams Prevent accidental negative stock or quantity entries to ensure accurate operations data.
Any Odoo Project User-friendly client-side input validation on numeric fields across all editable views.
Sales & Purchase Orders Avoid incorrect negative order lines that could corrupt pricing or fulfillment data.
Manufacturing Orders Ensure component quantities on production orders always remain valid and non-negative.

Installation Example

Simply add the widget attribute to any Integer or Float field in your view XML:

<!-- For Integer fields -->
<field name="quantity" widget="non_negative_integer"/>

<!-- For Float fields -->
<field name="price" widget="non_negative_float"/>

Installation Steps:

  1. Download the module and place it in your Odoo addons folder
  2. Verify dependencies: web
  3. Update App list (Settings → Apps → Update App List)
  4. Install Prevent Negative Values
  5. Add the widget attribute to desired fields in your view XML

Developer Friendly:

  1. Easy widget integration - single attribute on any field
  2. No backend override required
  3. Lightweight client-side validation
  4. Supports editable tree & one2many views
  5. Numpad & decimal input supported

Technical Specifications

Odoo Version: 18.0
Edition: Community & Enterprise
Framework: OWL (Odoo Web Library)
Validation Type: Client-side only
Field Types: Integer, Float
Browser Support: Chrome, Firefox, Safari, Edge (Latest)
Mobile Responsive: Fully Responsive
Numpad Support: Yes

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Contact Us

+91 8000168707, +91 9426376468
evozard@gmail.com
Google Chat
Connect on Google Chat

(evozard@gmail.com)

Support & Contact

Need help? Our team is ready to assist you.

  • Email: evozard@gmail.com
  • Skype: evozard.consulting
  • Documentation: Included in the module
Support Documentation Request Customization

Compatible: Odoo 18 • Community & Enterprise • Odoo.sh

© 2026 EVOZARD • All Rights Reserved

Prevent Negative Values in Odoo Integer & Float Fields

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