Hi,
I have QGIS projects that load Postgis views that are sometimes empty, sometimes contain data. I noticed that current master cannot load empty Postgis views anymore. The error message is that "PostgreSQL layer has no primary key". Note that I did select a primary key manually. Same issue if you load the view using "Add Postgis layer" or if you load an existing project that has a reference to the empty Postgis view. I checked the <datasource/> in the .qgs file and the primary key is present in the datasource element. So, there seems to be an issue that current master cannot load empty Postgis views. It is a regression, as this used to work in previous versions. Note that the reason why my view is sometimes empty is that it contains objects filtered by status "projected" - there can be dates when there are no elements with such a status. I hope this can be fixed before we ship QGIS 2.12. Opened as bug issue http://hub.qgis.org/issues/13638 Thanks, Andreas
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