<?xml version="1.0" encoding="UTF-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
                  http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

    <entity name="IDCI\Bundle\ExtraFormBundle\Model\ConfiguredType" table="configured_type">

        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
        </id>

        <field name="name" column="name" type="string" length="255" unique="true" />

        <field name="description" column="description" type="string" length="255" nullable="true" />

        <field name="tags" column="tags" type="array" />

        <field name="configuration" column="configuration" type="string" length="255" />

    </entity>

</doctrine-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
                  http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

    <entity name="IDCI\Bundle\ExtraFormBundle\Model\ConfiguredType" table="configured_type">

        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
        </id>

        <field name="name" column="name" type="string" length="255" unique="true" />

        <field name="description" column="description" type="string" length="255" nullable="true" />

        <field name="tags" column="tags" type="array" />

        <field name="configuration" column="configuration" type="text"/>

    </entity>

</doctrine-mapping>

Set the configuration field as text instead of string. The configuration can be really longer than 255
Set the configuration field as text instead of string. The configuration can be really longer than 255
