Orsdxy

I need to config a observer to detect when a option created in system.xml change its value.

The field is made by the code above:

<config>

    <sections>

         <dev>

            <groups>

                <pico_group>

                    <label>SGPico Configurações</label>

                    <frontend_type>text</frontend_type>

                    <sort_order>250</sort_order>

                    <show_in_default>1</show_in_default>

                    <show_in_website>1</show_in_website>

                    <show_in_store>1</show_in_store>

                    <fields>

                        <ativo translate="label">

                            <label>Pico está Ativo?</label>

                            <frontend_type>select</frontend_type>

                            <source_model>adminhtml/system_config_source_yesno</source_model>

                            <sort_order>1</sort_order>

                            <show_in_default>1</show_in_default>

                            <show_in_website>1</show_in_website>

                            <show_in_store>1</show_in_store>

                        </ativo>

                    </fields>

                </pico_group>

            </groups>

        </dev>

    </sections>

</config>

I search and tried to config the observer like that:

<admin_system_config_changed_section_dev_pico_group>

    <observers>

        <auto_invoice_order>

            <type>singleton</type>

            <class>IsabelaFlores_SGPico_Model_Observer</class>

            <method>teste</method>

        </auto_invoice_order>

    </observers>

</admin_system_config_changed_section_dev_pico_group>

But it didn't work

The right name of the event is

admin_system_config_changed_section_yoursectionname

group name pico_group is not necessary in your event observer configuration.

<admin_system_config_changed_section_dev> 

    <observers> 

        <auto_invoice_order> 

            <type>singleton</type> 

            <class>IsabelaFlores_SGPico_Model_Observer</class> 

            <method>teste</method> 

        </auto_invoice_order> 

    </observers> 

</admin_system_config_changed_section_dev>