How to add custom attributes to content

[jyr_]

I want to attach some custom attributes for e.g. weight (numeric) which uploading content using the DAM admin console. I also want to be able to fire a range query on this numeric field. From the 'Edit' section of the content, I could not find any way to add this custom field. Could you please suggest some way to do this? I may have to add multiple such attributes in future. Any help is really appreciated.

[Pradeep_Bhat]

To add custom attributes you need to load your own "layouts" which contains your desired attributes. You can add as many fields as u want.

Create a file layout-contrib.xml file. You can define ur fields through widgets. In nuxeo, each field/attribute is defined through widget. Write your widget in layout-contrib.xml. For example,

	<extension target="org.nuxeo.ecm.platform.forms.layout.WebLayoutManager"
	point="layouts">
    <layout name="My_layout">

		<templates>
			<template mode="any">/layouts/layout_default_template.xhtml
			</template>
		</templates>
	
		<rows>
			<row>
				<widget>weight_widget</widget>
			</row>

     <widget name="weight_widget" type="int">
        <labels>
				<label mode="any">Weight </label>
		</labels>
			<translated>false</translated>
			<fields>
				<field>lds:int_field</field>
			</fields>
		_	<properties widgetMode="edit">
				<property name="required">true</property>
			</properties>_
		</widget>
	
	</layout>

</extension>

Define your own schema, for example layout_demo_schema and declare it in core_types-contrib.xml as below.

<schema name="layout_demo_schema" prefix="lds"
		src="schema/layout_demo_schema.xsd" />

You need to define int_field type in layout_demo_schema.

In ui-types-contrib.xml file define your custom document type and dont forget to declare the layout for document. Consider the below,

    <type id="Custom_file_type">
		<icon>/icons/file.gif</icon>
		<bigIcon>/icons/file_100.png</bigIcon>
		<label>Custom_file_type</label>
		<description />
		<category>SimpleDocument</category>
		<default-view>view_documents</default-view>
		<layouts mode="any">
			<layout>My_layout</layout>
		</layouts>
	</type>

I got the solution like this. Hope you will find this helpful.