python-2.7 - on_change 事件中的 "TypeError: Cannot read property ' 值 ' of null"

Question

我发现 openerp 7 的文档令人沮丧。

我正在尝试从 on_change 事件调用一个函数来执行计算并将结果放入同一行内的另一个字段。

from openerp.osv import osv, fields

class degree_day(osv.osv):

_name = "degree.day"
_columns={
    'date': fields.date('Date'),
    'high_temp': fields.integer('High Temp'),
    'low_temp': fields.integer('Low Temp'),
    'heat_degree_day': fields.integer('Heat Degree Day' ),
    'hw_degree_day': fields.integer('HW Degree Day' ),
}

def generate_degree_day(self, cr, uid, ids, high_temp = 0, low_temp = 0, context=None):
    """ On change of temperature generate degree day numbers 
    @param high_temp: The day's high temperature
    @param low_temp: The day's low temperature
    """
    if not (high_temp and low_temp):
        return

    temp = 65 - (high_temp + low_temp) / 2

    if temp < 0:
        temp = 0

    heat_degree_day = temp
    hw_degree_day = temp + 5

<>

<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>
    <record id="degree_day_tree" model="ir.ui.view">
        <field name="name">degree.day.tree</field>
        <field name="model">degree.day</field>
        <field name="arch" type="xml">
            <tree string="Degree Day List" editable="bottom">
               <field name="date"  />
               <field name="high_temp" on_change="generate_degree_day(high_temp, low_temp)" />
               <field name="low_temp" />
               <field name="heat_degree_day"  /> 
               <field name="hw_degree_day" />
            </tree>
        </field>
    </record>

    <record id="show_degree_day" model="ir.actions.act_window">
        <field name="name">Degree Day</field>
        <field name="res_model">degree.day</field>
        <field name="view_type">form</field>
        <field name="view_mode">tree,form</field>
    </record>


    <menuitem name="Degree Day" id="menu_degree_day" action="show_degree_day"/>

</data>
</openerp>

Answer 1

OpenERP 期望onchange 函数返回以下格式的数据

{
 'value'   : {
                '<field_x>': <value for field x>,
                '<field_y>': <value for field y>,
             }
 'context' : <Context dict>
 'domain'  : {
                'field_a' : <domain filter for field_a>,
                'field_b' : <domain filter for fied_b>,
             }
 'warning' : {
                'title': '<warning message title>',
                'message': '<Warning message>'
             }
}

上下文、域、警告是可选的。值是强制性的，您可以在该值字典中包含零个或多个字段的更新值。

在你的例子中，在你的 onchange 函数结束时，你可以添加

return {'value':{'heat_degree_day':temp,'hw_degree_day':temp + 5}}