Update to 1.7 - Media picker error

[orchardbot]

tommck created: https://orchard.codeplex.com/workitem/20350

Everything you need to know is in here:

https://orchard.codeplex.com/discussions/452320#editor

[orchardbot]

tommck commented:

Repro steps:

• Set up a 1.6 installation
• Add a content type with media picker in it.
• add media with absolute urls
• add content that refers to those media
• upgrade to 1.7
• try to access those types

I can get more explicit when I have a chance, but it's pretty easy to repro

[orchardbot]

owleabf commented:

As added detail to this bug:

Since the admin summary view of medialibrarypicker uses the same code you'll get the same error in the admin viewing the Content tab since any existing items with a medialibrarypicker field will error out.

Functionally this is meaning that I'm having to:

1) query the db to find what contenttypes have mediapickers on them (since admin errors out) 2) edit that contenttype 3) drop the field 4) re-add it with a new name (old data persists under the previous name) 5) reattach every image in my site 6) Refactor code in any alternates that uses the Media Picker Field.

Pretty big impediment to upgrading...