I have been coding the reading for the last 3 days trying to find out what I am missing.

All I want to do is to add a config setting to the sale settings. The issue is that when I override the xml of setting page, Odoo cannot find the field.

Here is the error that I get:

 15-05-26 21:56:21,290 30095 INFO samy openerp.modules.loading: loading odootec_wh_count/odootec_res_config_view.xml
2015-05-26 21:56:21,321 30095 ERROR samy openerp.addons.base.ir.ir_ui_view: Field `group_qty_warning_on_selected_wh` does not exist

Error context:
View `sale settings`
[view_id: 716, xml_id: odootec_wh_count.odootec_view_sale_config, model: sale.config.settings, parent_id: 698]
2015-05-26 21:56:21,324 30095 INFO samy werkzeug: 127.0.0.1 - - [26/May/2015 21:56:21] "GET / HTTP/1.1" 500 -
2015-05-26 21:56:21,338 30095 ERROR samy werkzeug: Error on request:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 177, in run_wsgi
    execute(self.server.app)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 165, in execute
    application_iter = app(environ, start_response)
  File "/home/hesham/odoo/openerp/service/server.py", line 285, in app
    return self.app(e, s)
  File "/home/hesham/odoo/openerp/service/wsgi_server.py", line 216, in application
    return application_unproxied(environ, start_response)
  File "/home/hesham/odoo/openerp/service/wsgi_server.py", line 202, in application_unproxied
    result = handler(environ, start_response)
  File "/home/hesham/odoo/openerp/http.py", line 1290, in __call__
    return self.dispatch(environ, start_response)
  File "/home/hesham/odoo/openerp/http.py", line 1264, in __call__
    return self.app(environ, start_wrapped)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/wsgi.py", line 588, in __call__
    return self.app(environ, start_response)
  File "/home/hesham/odoo/openerp/http.py", line 1426, in dispatch
    ir_http = request.registry['ir.http']
  File "/home/hesham/odoo/openerp/http.py", line 345, in registry
    return openerp.modules.registry.RegistryManager.get(self.db) if self.db else None
  File "/home/hesham/odoo/openerp/modules/registry.py", line 339, in get
    update_module)
  File "/home/hesham/odoo/openerp/modules/registry.py", line 370, in new
    openerp.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/home/hesham/odoo/openerp/modules/loading.py", line 351, in load_modules
    force, status, report, loaded_modules, update_module)
  File "/home/hesham/odoo/openerp/modules/loading.py", line 255, in load_marked_modules
    loaded, processed = load_module_graph(cr, graph, progressdict, report=report, skip_modules=loaded_modules, perform_checks=perform_checks)
  File "/home/hesham/odoo/openerp/modules/loading.py", line 176, in load_module_graph
    _load_data(cr, module_name, idref, mode, kind='data')
  File "/home/hesham/odoo/openerp/modules/loading.py", line 118, in _load_data
    tools.convert_file(cr, module_name, filename, idref, mode, noupdate, kind, report)
  File "/home/hesham/odoo/openerp/tools/convert.py", line 901, in convert_file
    convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
  File "/home/hesham/odoo/openerp/tools/convert.py", line 987, in convert_xml_import
    obj.parse(doc.getroot(), mode=mode)
  File "/home/hesham/odoo/openerp/tools/convert.py", line 853, in parse
    self._tags[rec.tag](self.cr, rec, n, mode=mode)
  File "/home/hesham/odoo/openerp/tools/convert.py", line 763, in _tag_record
    id = self.pool['ir.model.data']._update(cr, self.uid, rec_model, self.module, res, rec_id or False, not self.isnoupdate(data_node), noupdate=self.isnoupdate(data_node), mode=self.mode, context=rec_context )
  File "/home/hesham/odoo/openerp/api.py", line 241, in wrapper
    return old_api(self, *args, **kwargs)
  File "/home/hesham/odoo/openerp/addons/base/ir/ir_model.py", line 1050, in _update
    model_obj.write(cr, uid, [res_id], values, context=context)
  File "/home/hesham/odoo/openerp/api.py", line 241, in wrapper
    return old_api(self, *args, **kwargs)
  File "/home/hesham/odoo/openerp/addons/base/ir/ir_ui_view.py", line 282, in write
    context)
  File "/home/hesham/odoo/openerp/api.py", line 241, in wrapper
    return old_api(self, *args, **kwargs)
  File "/home/hesham/odoo/openerp/api.py", line 363, in old_api
    result = method(recs, *args, **kwargs)
  File "/home/hesham/odoo/openerp/models.py", line 3774, in write
    self._write(old_vals)
  File "/home/hesham/odoo/openerp/api.py", line 239, in wrapper
    return new_api(self, *args, **kwargs)
  File "/home/hesham/odoo/openerp/api.py", line 546, in new_api
    result = method(self._model, cr, uid, self.ids, *args, **kwargs)
  File "/home/hesham/odoo/openerp/models.py", line 3945, in _write
    recs._validate_fields(vals)
  File "/home/hesham/odoo/openerp/api.py", line 239, in wrapper
    return new_api(self, *args, **kwargs)
  File "/home/hesham/odoo/openerp/models.py", line 1270, in _validate_fields
    raise ValidationError('\n'.join(errors))
ParseError: "ValidateError
Field(s) `arch` failed against a constraint: Invalid view definition

Error details:
Field `group_qty_warning_on_selected_wh` does not exist

Error context:
View `sale settings`
[view_id: 716, xml_id: odootec_wh_count.odootec_view_sale_config, model: sale.config.settings, parent_id: 698]" while parsing /home/hesham/odootec-projects/odootec-repo/odootec_wh_count/odootec_res_config_view.xml:4, near
<record id="odootec_view_sale_config" model="ir.ui.view">
                <field name="name">sale settings</field>
                <field name="model">sale.config.settings</field>
                <field name="inherit_id" ref="sale.view_sales_config"/>
                <!--<field name="priority" eval="16"/>-->
                <field name="arch" type="xml">
                        <xpath expr="//div[@name='warehouse_features']" position="inside">
                        <div>
                            XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                            <field name="group_qty_warning_on_selected_wh" class="oe_inline"/>
                            <label for="group_qty_warning_on_selected_wh"/>
                        </div>
                    </xpath>
                </field>
            </record>

class sale_quote_settings(models.TransientModel):
    _name = 'sale_quote.config.settings'
    _inherit = 'sale.config.settings'

    group_qty_warning_on_selected_wh = fields.Boolean(_('Qty warning on selected warehouse'),
        group="", implied_group="",
        required=True, default=True,
        help=_("To restrict product count to the stock location of selected warehouse only, when making a quotation"))

<?xml version="1.0" encoding="utf-8"?>
    <openerp>
        <data>
            <record id="odootec_view_sale_config" model="ir.ui.view">
                <field name="name">sale settings</field>
                <field name="model">sale.config.settings</field>
                <field name="inherit_id" ref="sale.view_sales_config"/>
                <!--<field name="priority" eval="16"/>-->
                <field name="arch" type="xml">
                        <xpath expr="//div[@name='warehouse_features']" position="inside">
                        <div>  
                            <field name="group_qty_warning_on_selected_wh" class="oe_inline"/>
                            <label for="group_qty_warning_on_selected_wh"/>
                        </div>
                    </xpath>
                </field>
            </record>
        </data>
    </openerp>