Why doesn't custom block appear on product page

Question

Good afternoon, I'm suspecting this is an easy oversight.. I've been working today on putting a custom block onto a product page. But, nothing from my template is showing up. Take a look at my code below:

my config.xml:

<config>
    <modules>
        <Foo_Bar>
            <version>1.0</version>
        </Foo_Bar>
    </modules>
    <global>
        <models>
            <foo_bar>
                <class>Foo_Bar_Model</class>
                <resourceModel>bar_resource</resourceModel>
            </foo_bar>
            <bar_resource>
                <class>CWD_Appratings_Model_Resource</class>
                <entities>
                    <rating>bar_rating</rating>
                </entities>
            </bar_resource>
        </models>
        <blocks>
            <foo_bar>Foo_Bar_Block</foo_bar>
        </blocks>
        <helpers>
            <foo_bar>
                <class>Foo_Bar_Helper</class>
            </foo_bar>
        </helpers>
    </global>
    <frontend>
        <layout>
            <foo_bar>
                <file>foo_bar.xml</file>
            </foo_bar>
        </layout>
    </frontend>
</config>

My theme/default/layout/foo_bar.xml

<layout version="0.1.0">
    <catalog_product_view>
        <reference name="product.info">
            <block type="catalog/product_view"  name="bar_widget" as="bar_widget" template="foo/bar/widget.phtml" />
        </reference>
    </catalog_product_view>
</layout>

and my code in theme/template/catalog/product/view.phtml

<div class="app-ratings">
    <?php echo $this->getChildHtml('bar_widget'); ?>
</div>

Answer 1

You forgot a node in your config file :

<frontend>
    <layout>
        <updates> <-- this one
           <foo_bar>
               <file>foo_bar.xml</file>
           </foo_bar>
        </updates>
    </layout>
</frontend>

Answer 2

Please add update tag inside layout node in you config.xml like <updates> <foo_bar> <file>foo_bar.xml</file> </foo_bar> </updates>