Odoo Date Logic Validator
Prevent Invalid Date Ranges & Reverse Timelines Across Contracts, Projects, and Leaves
Automatically block records where the Start Date is later than the End Date. Pure Python constraint protection for UI entries, bulk CSV imports, and API integrations.
Protected Models & Fields
| Target Document | Model Name | Start Field | End Field |
|---|---|---|---|
| Employee Contract | hr.contract |
date_start |
date_end |
| Project Management | project.project |
date_start |
date (Expiration) |
| Time Off / Leaves | hr.leave |
request_date_from |
request_date_to |
Core Logic
Centralized Date Mixin
Uses a single reusable date.validation.mixin with standard @api.constrains. Guarantees 100% consistent date ordering checks across HR, Projects, and Leaves without duplicate code.
User Experience
Clear Error Messages
When an invalid date range is detected, Odoo raises a clear UserError / ValidationError explicitly stating the record name, field labels, and exact entered dates.
Integrity
Null-Safe Operations
Ignores open-ended contracts or ongoing projects where either the start or end date is left empty.
Performance
Zero Overhead
No custom views, no database migrations, no javascript assets. Executes instantly on database create and write calls.
Validation Error Example
ValidationError: Invalid Date Range on 'Software Developer Contract - John Doe':
'Start Date' (2026-08-01) cannot be later than 'Contract End Date' (2026-07-01).
Please correct the dates before saving.
Complete User Interface Walkthrough
A clean, standard Odoo UI matching the core accounting platform theme flawlessly.
| Availability |
Odoo Online
Odoo.sh
On Premise
|
| Odoo Apps Dependencies |
•
Employees (hr)
• Project (project) • Time Off (hr_holidays) • Discuss (mail) • Calendar (calendar) |
| Lines of code | 55 |
| Technical Name |
validate_start_end_date |
| License | OPL-1 |
| Website | https://syncsoft.app |
Odoo Proprietary License v1.0 This software and associated files (the "Software") may only be used (executed, modified, executed after modifications) if you have purchased a valid license from the authors, typically via Odoo Apps, or if you have received a written agreement from the authors of the Software (see the COPYRIGHT file). You may develop Odoo modules that use the Software as a library (typically by depending on it, importing it and using its resources), but without copying any source code or material from the Software. You may distribute those modules under the license of your choice, provided that this license is compatible with the terms of the Odoo Proprietary License (For example: LGPL, MIT, or proprietary licenses similar to this one). It is forbidden to publish, distribute, sublicense, or sell copies of the Software or modified copies of the Software. The above copyright notice and this permission notice must be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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