Store optionnaly geometry, bbox or field value

[mdouchin]

When dealing with large datasets, it could be handy to have an option letting the user decide which data to store:

• geometry in WKB (as default now)
• geometry in GeoJSON ( for small datasets, it could be handy to use the database outside QGIS )
• bbox as a string 'Xmin,Ymin,Xmax,Ymax' -> the plugin would show a rectangle around the feature instead of its geometry (much smaller than storing full wkb geom ). Another app could use the generated database and get the bbox to display.
• primary key of the layer (or another field) -> the plugin (or other app outside QGIS) would be able to query the feature (of course knowledge of the layer structure is necessary here).

This could be an option put just under the Field/Expression input when adding a new "layer search". We could have the type chosen stored in the metadata for the layer, and the plugin would act depending on it.

[mdouchin]

I could propose a PR if there is a consensus around this idea

[3nids]

This sounds like a good option! Feel free to PR!

[mdouchin]

@3nids What is the branch compatible with QGIS 2.* I have just read the metadata file, and master is obviously made for upcoming QGIS 3

[3nids]

my first intention was not to release any new 2.x version. I just made a new branch master_2.

[mdouchin]

Ok, thanks !

[mdouchin]

pr #52 proposed, need some testing ( just wrote it without testing in QGIS, waiting to build V3 )

[mdouchin]

pr #53 for master_2 branch (tested in QGIS 2.16)