Update image bkg path when not originally provided

If an image is loaded from the DB and the background_path is not defined but it is defined in the current run, the path is updated and saved to the DB.

Fixes #341.

CHANGELOG.md

@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ## [Unreleased](https://github.com/askap-vast/vast-pipeline/compare/0.1.0...HEAD)
 
 #### Added
+- Updates image `background_path` from current run when not originally provided [#377](https://github.com/askap-vast/vast-pipeline/pull/377).
 - Fills out information on all webinterface detail pages [#345](https://github.com/askap-vast/vast-pipeline/pull/345).
 - Adds frequency information the measurements and images webinterface tables. [#345](https://github.com/askap-vast/vast-pipeline/pull/345).
 - Adds celestial plot and tables to webinterface pipeline detail page [#345](https://github.com/askap-vast/vast-pipeline/pull/345).
@@ -33,6 +34,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Removed `static/css/collapse-box.css`, content moved to `pipeline.css` [#345](https://github.com/askap-vast/vast-pipeline/pull/345).
 
 #### List of PRs
+- [#377](https://github.com/askap-vast/vast-pipeline/pull/377) fix: Update image bkg path when not originally provided.
 - [#372](https://github.com/askap-vast/vast-pipeline/pull/372) fix: fix social auth scope setting name.
 - [#345](https://github.com/askap-vast/vast-pipeline/pull/345) feat, fix: Website improvements.
 

vast_pipeline/pipeline/utils.py

@@ -101,6 +101,10 @@ def get_create_img(p_run, band_id, image):
     img = Image.objects.filter(name__exact=image.name)
     if img.exists():
         img = img.get()
+        # Add background path if not originally provided
+        if image.background_path and not img.background_path:
+            img.background_path = image.background_path
+            img.save()
         skyreg = get_create_skyreg(p_run, img)
         # check and add the many to many if not existent
         if not Image.objects.filter(