Create configurable, spreadsheet-like tables in any Odoo model using a single Json field. Add/rename/remove columns, switch types (text, selection, boolean, image), manage options, edit rows, and export to CSV — all from the form view.

1. Copy the module into your addons path.
2. Update App list and install.
3. Ensure your model has a fields.Json field to store the data.

<!-- Python model -->
from odoo import models, fields

class ChecklistJob(models.Model):
    _name = "mw.checklist.job"
    task_data = fields.Json(string="Task Data")  # stores {columns: [...], rows: [...]}

<!-- XML form view -->
<field name="task_data" widget="json_table"
       options="{'hide_column_controls': False}"/>

The widget writes back a single JSON structure to the field whenever you edit:

{
  "columns": [
    {"name": "Room", "type": "text"},
    {"name": "Checked", "type": "boolean"},
    {"name": "Quarter", "type": "selection", "options": ["Q1","Q2","Q3","Q4"]},
    {"name": "Photo", "type": "image"}
  ],
  "rows": [
    {"Room": "101", "Checked": true, "Quarter": "Q2", "Photo": "data:image/png;base64,..."}
  ]
}

• Images: client-side size check <= 2 MB; stored as Data URL in the JSON field.
• CSV Export: adds BOM for Excel compatibility; boolean → "True/False", images → "Image Data".
• Type changes: switching a column's type resets its cell values to sensible defaults.