Hi,

You can write a constraint for the field such a way that it will block the input less than 1 and greater than 100.

@api.one
@api.constrains('field_name')
def _check_value(self):
    if self.field_name > 100 or self.field_name < 0:
        raise ValidationError(_('Enter Value Between 0-100.'))

Thanks

It  is still giving error Cybrosys Techno Solutions Pvt.Ltd
Error:
Odoo Server Error

Traceback (most recent call last):
  File "/opt/odoo12/odoo/odoo/models.py", line 1108, in _validate_fields
    check(self)
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_ui_view.py", line 351, in _check_xml
    self.postprocess_and_fields(view.model, view_doc, view.id)
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_ui_view.py", line 1059, in postprocess_and_fields
    self.raise_view_error(_('Model not found: %(model)s') % dict(model=model), view_id)
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_ui_view.py", line 545, in raise_view_error
    raise ValueError(message)
ValueError: Model not found: tender.manage

Error context:
View `Tender Managemet`
[view_id: 768, xml_id: bhuwan_module.tender_manage_view_tree, model: tender.manage, parent_id: n/a]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/odoo12/odoo/odoo/tools/convert.py", line 757, in parse
    self._tags[rec.tag](rec, de, mode=mode)
  File "/opt/odoo12/odoo/odoo/tools/convert.py", line 662, in _tag_record
    record = model.with_context(rec_context)._load_records([data], self.mode == 'update')
  File "/opt/odoo12/odoo/odoo/models.py", line 3788, in _load_records
    data['record'].write(data['values'])
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_ui_view.py", line 441, in write
    return super(View, self).write(self._compute_defaults(vals))
  File "/opt/odoo12/odoo/odoo/models.py", line 3306, in write
    fields[0].determine_inverse(records)
  File "/opt/odoo12/odoo/odoo/fields.py", line 1097, in determine_inverse
    getattr(records, self.inverse)()
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_ui_view.py", line 275, in _inverse_arch
    view.write(data)
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_ui_view.py", line 441, in write
    return super(View, self).write(self._compute_defaults(vals))
  File "/opt/odoo12/odoo/odoo/models.py", line 3269, in write
    self._write(store_vals)
  File "/opt/odoo12/odoo/odoo/models.py", line 3413, in _write
    self._validate_fields(vals)
  File "/opt/odoo12/odoo/odoo/models.py", line 1112, in _validate_fields
    raise ValidationError("%s\n\n%s" % (_("Error while validating constraint"), tools.ustr(e)))
odoo.exceptions.ValidationError: ('Error while validating constraint\n\nModel not found: tender.manage\n\nError context:\nView `Tender Managemet`\n[view_id: 768, xml_id: bhuwan_module.tender_manage_view_tree, model: tender.manage, parent_id: n/a]', None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/odoo12/odoo/odoo/http.py", line 654, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo12/odoo/odoo/http.py", line 312, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/opt/odoo12/odoo/odoo/tools/pycompat.py", line 87, in reraise
    raise value
  File "/opt/odoo12/odoo/odoo/http.py", line 696, in dispatch
    result = self._call_function(**self.params)
  File "/opt/odoo12/odoo/odoo/http.py", line 344, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/odoo12/odoo/odoo/service/model.py", line 97, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/odoo12/odoo/odoo/http.py", line 337, in checked_call
    result = self.endpoint(*a, **kw)
  File "/opt/odoo12/odoo/odoo/http.py", line 939, in __call__
    return self.method(*args, **kw)
  File "/opt/odoo12/odoo/odoo/http.py", line 517, in response_wrap
    response = f(*args, **kw)
  File "/opt/odoo12/odoo/addons/web/controllers/main.py", line 966, in call_button
    action = self._call_kw(model, method, args, {})
  File "/opt/odoo12/odoo/addons/web/controllers/main.py", line 954, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/opt/odoo12/odoo/odoo/api.py", line 749, in call_kw
    return _call_kw_multi(method, model, args, kwargs)
  File "/opt/odoo12/odoo/odoo/api.py", line 736, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "<decorator-gen-67>", line 2, in button_immediate_upgrade
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_module.py", line 73, in check_and_log
    return method(self, *args, **kwargs)
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_module.py", line 613, in button_immediate_upgrade
    return self._button_immediate_function(type(self).button_upgrade)
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_module.py", line 552, in _button_immediate_function
    modules.registry.Registry.new(self._cr.dbname, update_module=True)
  File "/opt/odoo12/odoo/odoo/modules/registry.py", line 86, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/opt/odoo12/odoo/odoo/modules/loading.py", line 417, in load_modules
    force, status, report, loaded_modules, update_module, models_to_check)
  File "/opt/odoo12/odoo/odoo/modules/loading.py", line 313, in load_marked_modules
    perform_checks=perform_checks, models_to_check=models_to_check
  File "/opt/odoo12/odoo/odoo/modules/loading.py", line 222, in load_module_graph
    load_data(cr, idref, mode, kind='data', package=package, report=report)
  File "/opt/odoo12/odoo/odoo/modules/loading.py", line 68, in load_data
    tools.convert_file(cr, package.name, filename, idref, mode, noupdate, kind, report)
  File "/opt/odoo12/odoo/odoo/tools/convert.py", line 801, in convert_file
    convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
  File "/opt/odoo12/odoo/odoo/tools/convert.py", line 864, in convert_xml_import
    obj.parse(doc.getroot(), mode=mode)
  File "/opt/odoo12/odoo/odoo/tools/convert.py", line 754, in parse
    self.parse(rec, mode)
  File "/opt/odoo12/odoo/odoo/tools/convert.py", line 763, in parse
    exc_info[2]
  File "/opt/odoo12/odoo/odoo/tools/pycompat.py", line 86, in reraise
    raise value.with_traceback(tb)
  File "/opt/odoo12/odoo/odoo/tools/convert.py", line 757, in parse
    self._tags[rec.tag](rec, de, mode=mode)
  File "/opt/odoo12/odoo/odoo/tools/convert.py", line 662, in _tag_record
    record = model.with_context(rec_context)._load_records([data], self.mode == 'update')
  File "/opt/odoo12/odoo/odoo/models.py", line 3788, in _load_records
    data['record'].write(data['values'])
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_ui_view.py", line 441, in write
    return super(View, self).write(self._compute_defaults(vals))
  File "/opt/odoo12/odoo/odoo/models.py", line 3306, in write
    fields[0].determine_inverse(records)
  File "/opt/odoo12/odoo/odoo/fields.py", line 1097, in determine_inverse
    getattr(records, self.inverse)()
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_ui_view.py", line 275, in _inverse_arch
    view.write(data)
  File "/opt/odoo12/odoo/odoo/addons/base/models/ir_ui_view.py", line 441, in write
    return super(View, self).write(self._compute_defaults(vals))
  File "/opt/odoo12/odoo/odoo/models.py", line 3269, in write
    self._write(store_vals)
  File "/opt/odoo12/odoo/odoo/models.py", line 3413, in _write
    self._validate_fields(vals)
  File "/opt/odoo12/odoo/odoo/models.py", line 1112, in _validate_fields
    raise ValidationError("%s\n\n%s" % (_("Error while validating constraint"), tools.ustr(e)))
odoo.tools.convert.ParseError: "Error while validating constraint

Model not found: tender.manage

Error context:
View `Tender Managemet`
[view_id: 768, xml_id: bhuwan_module.tender_manage_view_tree, model: tender.manage, parent_id: n/a]
None" while parsing /opt/odoo12/odoo/addons/bhuwan_module/views/tendermanage_view.xml:4, near
<record id="tender_manage_view_tree" model="ir.ui.view">
            <field name="name">Tender Managemet</field>
            <field name="model">tender.manage</field>
            <field name="arch" type="xml">
                <tree>
                    <field name="name_of_company"/>
                    <field name="category"/>
                    <field name="publ_date"/>
                    <field name="subm_date"/>
                    <field name="field_type"/>
                </tree>
            </field>
        </record>