openerp学习笔记 错误、警告、提示、确认信息显示

1.检查业务逻辑中的错误，终止代码执行，显示错误或警告信息：

　raise osv.except_osv(_('Error!'), _('Error Message.'))

示例代码：

    #删除当前销售单，需要验证销售单的状态
    def unlink(self, cr, uid, ids, context=None):
        for rec in self.browse(cr, uid, ids, context=context):
            if rec.state not in ['draft']:
                raise osv.except_osv(_(u'警告!'),_(u'您不能删除以下状态的销售单 %s .')%(rec.state))
            if rec.create_uid.id != uid:
                raise osv.except_osv(_(u'警告!'),_(u'您不能删除他人创建的单据.'))
        return super(sale, self).unlink(cr, uid, ids, context) 

2.字段的 onchange 事件中返回值，同时返回提示信息：

　warning = {
　　'title': _('Warning!'),
　　'message' : _('Warning Message.')
　　}
　return {'warning': warning, 'value': value}

示例代码：

    def onchange_pricelist_id(self, cr, uid, ids, pricelist_id, order_lines, context=None):
        context = context or {}
        if not pricelist_id:
            return {}
        value = {
            'currency_id': self.pool.get('product.pricelist').browse(cr, uid, pricelist_id, context=context).currency_id.id
        }
        if not order_lines:
            return {'value': value}
        warning = {
            'title': _('Pricelist Warning!'),
            'message' : _('If you change the pricelist of this order (and eventually the currency), prices of existing order lines will not be updated.')
        }
        return {'warning': warning, 'value': value}

3.视图中 button 按钮点击时显示确认信息：

　<button name="cancel_voucher" string="Cancel Voucher" type="object" states="posted" confirm="Are you sure you want to unreconcile this record?"/>

示例代码：

        <!-- This general view is used in 
             Invoicing - Journal Entries - Journal Vouchers -->
        <record model="ir.ui.view" id="view_voucher_form">
            <field name="name">account.voucher.form</field>
            <field name="model">account.voucher</field>
            <field name="arch" type="xml">
                <form string="Accounting Voucher" version="7.0">
                  <header>
                      <button name="proforma_voucher" string="Post" states="draft" class="oe_highlight"/>
                      <button name="cancel_voucher" string="Cancel Voucher" type="object" states="posted" confirm="Are you sure you want to unreconcile this record?"/>
                      <button name="cancel_voucher" string="Cancel Voucher" states="draft,proforma" />
                      <button name="action_cancel_draft" type="object" states="cancel" string="Set to Draft"/>
                      <field name="state" widget="statusbar" statusbar_visible="draft,posted" statusbar_colors='{"proforma":"blue"}'/>
                  </header>
                  <sheet string="Accounting Voucher">
                    <group col="4" colspan="4">
                        <field name="partner_id" required="1" on_change="onchange_journal_voucher(line_ids, tax_id, amount, partner_id, journal_id, type)"/>
                        <field name="date" on_change="onchange_date(date, currency_id, payment_rate_currency_id, amount, company_id)"/>
                        <field name="journal_id" widget="selection" on_change="onchange_journal_voucher(line_ids, tax_id, amount, partner_id, journal_id, type)"/>
                        <field name="type" required="1"/>
                        <field name="name" colspan="2"/>
                        <field name="company_id" widget="selection" groups="base.group_multi_company"/>
                        <field name="reference"/>
                        <field name="number"/>
                        <field name="currency_id" groups="base.group_multi_currency"/>
                        <field name="account_id" widget="selection" invisible="True"/>
                        <field name="payment_rate_currency_id" invisible="1"/>
                    </group>
                    <notebook colspan="4">
                        <page string="Voucher Entry">
                            <field name="line_ids" on_change="onchange_price(line_ids, tax_id, partner_id)" context="{'journal_id':journal_id, 'type':type, 'partner_id':partner_id}">
                                <tree string="Voucher Items" editable="bottom">
                                    <field name="account_id"/>
                                    <field name="name"/>
                                    <field name="amount" sum="Total Amount"/>
                                    <field name="type"/>
                                    <field name="account_analytic_id" groups="analytic.group_analytic_accounting"/>
                                </tree>
                            </field>
                            <group>
                                <field name="narration" nolabel="1" placeholder="Internal Notes"/>
                                <group class="oe_subtotal_footer oe_right" attrs="{'invisible':[('type','in',['payment', 'receipt', False])]}">
                                    <field name="tax_id" on_change="onchange_price(line_ids, tax_id, partner_id)" widget="selection" nolabel="1"/>
                                    <field name="tax_amount" nolabel="1"/>
                                    <div class="oe_subtotal_footer_separator">
                                        <label for="amount"/>
                                        <button type="object" icon="terp-stock_format-scientific"   name="compute_tax" class="oe_link oe_edit_only" string="(Update)" attrs="{'invisible': [('state','!=','draft')]}"/>
                                    </div>
                                    <field name="amount" class="oe_subtotal_footer_separator" nolabel="1"/>
                                </group>
                            </group>
                        </page>
                        <page string="Journal Items" attrs="{'invisible': [('state','!=','posted')]}">
                            <group col="4">
                                <field name="period_id"/>
                                <field name="audit"/>
                            </group>
                            <field name="move_ids" readonly="1">
                               <tree string="Journal Items">
                                   <field name="move_id"/>
                                   <field name="ref"/>
                                   <field name="date"/>
                                   <field name="statement_id"/>
                                   <field name="partner_id"/>
                                   <field name="account_id"/>
                                   <field name="name"/>
                                   <field name="debit"/>
                                   <field name="credit"/>
                                   <field name="state"/>
                                   <field name="reconcile_id"/>
                               </tree>
                            </field>
                        </page>
                    </notebook>
                  </sheet>
                  <div class="oe_chatter">
                      <field name="message_follower_ids" widget="mail_followers"/>
                      <field name="message_ids" widget="mail_thread"/>
                  </div>
                </form>
            </field>
        </record>