<field name="matrix_subtype" attrs="{'invisible':[('type','not in',['matrix'])]}"/>
</group>
<group string="Display mode" attrs="{'invisible':[('type','not in',['simple_choice', 'multiple_choice'])]}">
- <field name="display_mode" string="Format" attrs="{'invisible':[('type','not in',['simple_choice'])]},'required':[('type','=','simple_choice')]}"/>
+ <field name="display_mode" string="Format" attrs="{'invisible':[('type','not in',['simple_choice'])],'required':[('type','=','simple_choice')]}"/>
<field name="column_nb" string="Number of columns" attrs="{'invisible':[('display_mode','=','dropdown'), ('type','=','simple_choice')]}"/>
</group>
<group string="Allow Comments" attrs="{'invisible':[('type','not in',['simple_choice','multiple_choice', 'matrix'])]}">