= Changing the !ContentType of object while migrating content with quintagroup.transmogrifier =

Type conversion can be done on content import. 

Item import process consists of two steps:
 1. object has to be created
 2. object is updated with field values and other attributes

The correction for the first step can be done with substitution pipeline, the second one - with xslt pipeline. Alternatively, you can use datacorrector pipeline, but it will require registering specific corrector adapters.

The [wiki:quintagroup.transmogrifier/substitution quintagroup.transmogrifier.substitution] blueprint is used in tandem with [wiki:quintagroup.transmogrifier/xslt quintagroup.transmogrifier.xslt]
 

In your import configuration (import.cfg) insert '''substitution''' exactly before the '''constructor''' pipeline, then '''xslt''' goes. And it should look like:
{{{
pipeline =
    ...
    substitution
    constructor
    xslt
    ...
}}}


We are going to replace Large Plone Folder with Folder, it is basic example in getting Members folder imported into Plone 4. The item's key for content_type is '''_type''' and the old value is saved in '''_old_type'''.

{{{
[substitution]
blueprint = quintagroup.transmogrifier.substitution
key = _type
Large Plone Folder = Folder
}}}

In xslt section we also have to mention the keys as values for '''from-key''' and '''to-key''' options. 

{{{
[xslt]
blueprint = quintagroup.transmogrifier.xslt
source = marshall
from-key = _old_type
to-key = _type

}}}


Detailed description of pipelines is available here:
 * [wiki:quintagroup.transmogrifier/substitution quintagroup.transmogrifier.substitution]
 * [wiki:quintagroup.transmogrifier/xslt quintagroup.transmogrifier.xslt]