Magento - 2 or more observer on same event

问题

2 of my observer are observing same sales_order_shipment_save_before event. ModuleA was the one i created first and then i created ModuleB

Now only ModuleB's observer is called and not ModuleA.

Please let me know how can i resolve this and both of observers are called.

ModuleA

<?xml version="1.0"?>
<config>
    <global>
        <models>
            <shipmentsave>
                <class>My_Shipmentsave_Model</class>
            </shipmentsave>
        </models>
    </global>
    <adminhtml>
        <events>
            <sales_order_shipment_save_before>
                <observers>
                    <shipmentsave>
                        <type>singleton</type>
                        <class>shipmentsave/observer</class>
                        <method>salesOrderShipmentSaveBefore</method>
                    </shipmentsave>
                </observers>
            </sales_order_shipment_save_before>
        </events>
    </adminhtml>
</config>

Observer.php

<?php

    class My_Shipmentsave_Model_Observer
{
    public function salesOrderShipmentSaveBefore(Varien_Event_Observer $observer)
    {
        $shipment = $observer->getEvent()->getShipment();
        return;
    }
}

ModuleB

<?xml version="1.0" encoding="UTF-8"?>
<config>
  <modules>
    <My_Bshipment>
      <version>0.1.0</version>
    </My_Bshipment>
  </modules>
  <admin>
    <routers>
      <bshipment>
    <use>admin</use>
    <args>
      <module>My_Bshipment</module>
                    <frontName>bshipment</frontName>
    </args>
      </bshipment>
    </routers>
  </admin>
  <adminhtml>
    <events>
      <sales_order_shipment_save_before>
        <observers>
          <shipmentsave>
            <type>singleton</type>
            <class>bshipment/observer</class>
            <method>salesOrderShipmentSaveBefore</method>
          </shipmentsave>
        </observers>
      </sales_order_shipment_save_before>
    </events>
  </adminhtml> 
  <global>
    <models>
      <bshipment>
    <class>My_Bshipment_Model</class>
      </bshipment>
    </models>
    <resources>       
      <bshipment_setup>
        <setup>
          <module>My_Bshipment</module>
        </setup>
        <connection>
          <use>core_setup</use>
        </connection>
      </bshipment_setup>
      <bshipment_write>
        <connection>
          <use>core_write</use>
        </connection>
      </bshipment_write>
      <bshipment_read>
        <connection>
          <use>core_read</use>
        </connection>
      </bshipment_read>
    </resources>
    <blocks>
      <!-- adminhtml>
      <rewrite>
    <shipment_view>My_Bshipment_Block_Adminhtml_Shipment_View</shipment_view>
      </rewrite>
      </adminhtml-->
      <adminhtml>
    <rewrite>
      <sales_order_shipment_view>My_Bshipment_Block_Adminhtml_Shipment_View</sales_order_shipment_view>
    </rewrite>
    <rewrite>
      <sales_shipment_grid>My_Bshipment_Block_Adminhtml_Shipment_Grid</sales_shipment_grid>
    </rewrite>
      </adminhtml>          
      <!-- udropship>
      <rewrite>
    <adminhtml_shipment_view>My_Bshipment_Block_Adminhtml_Shipment_View</adminhtml_shipment_view>
      </rewrite>
      </udropship-->
    </blocks>
    <helpers>
        <bshipment>
            <class>My_Bshipment_Helper</class>
        </bshipment>
    </helpers>

  </global>
</config>

Observer.php

<?php
class My_Bshipment_Model_Observer
{
    public function salesOrderShipmentSaveBefore(Varien_Event_Observer $observer)
    {
        $shipment = $observer->getEvent()->getShipment();
    return;
    }
}

Regards, Saurabh

回答1:

No time to test this, but at first glance I'd try making

<shipmentsave>

distinct for each module. Something like

    <observers>
      <shipmentsave>
        <type>singleton</type>
        <class>bshipment/observer</class>
        <method>salesOrderShipmentSaveBefore</method>
      </shipmentsave>
    </observers>

and

    <observers>
      <bshipmentsave>
        <type>singleton</type>
        <class>bshipment/observer</class>
        <method>salesOrderShipmentSaveBefore</method>
      </bshipmentsave>
    </observers>

回答2:

Each observer should have a unique name. In the code both observer have the same name. So give unique name to each observer.

回答3:

I think you are missing something. You can call as many functions as you can using observers for an event. But for each event, the observer's method name should be different, as well as its id.

<events>
    <sales_order_shipment_save_before>
        <observers>
            <shipmentsave>
                <type>singleton</type>
                <class>shipmentsave/observer</class>
                <method>salesOrderShipmentSaveBefore</method>
            </shipmentsave>
        </observers>
    </sales_order_shipment_save_before>
</events>

<events>
    <sales_order_shipment_save_before>
        <observers>
            <shipmentsave>
                <type>singleton</type>
                <class>bshipment/observer</class>
                <method>salesOrderShipmentSaveBefore</method>
            </shipmentsave>
        </observers>
    </sales_order_shipment_save_before>
</events>

You can see in the XML that the id shipmentsave and method salesOrderShipmentSaveBefore is the same.

Just change this and you are all done.

来源：https://stackoverflow.com/questions/3491813/magento-2-or-more-observer-on-same-event