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Module: Maintenance

Entity: maintenance.equipment.category

Compute Method: _compute_maintenance_count

Inputs Method Outputs 
maintenance_data = self.env['maintenance.request']._read_group([('category_id', 'in', self.ids)], ['category_id', 'archive'], ['__count'])
mapped_data = {(category.id, archive): count for category, archive, count in maintenance_data}
for category in self:
            category.maintenance_open_count = mapped_data.get((category.id, False), 0)
            category.maintenance_count = category.maintenance_open_count + mapped_data.get((category.id, True), 0)

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