[Qgis-user] Python to export layouts

[Paul Wittle]

Hi,

I've found the python code to export a layout from a QGIS project directly from the command line which is great but the database overlays are missing from the resulting PDF.

The layers use the authentication manager so I suspect it is something to do with initialising the password manager correctly but the example I've found so far is for an older version. Is anyone able to point me at an example that uses overlays from a database?

This is what I have so far:
#!/usr/bin/env python3
import os, time
from qgis.core import (QgsProject, QgsLayoutExporter, QgsApplication, QgsAuthManager)

QgsApplication.setPrefixPath("/usr", True)

gui_flag = False
app = QgsApplication([], gui_flag)

app.initQgis()

project_path = os.getcwd() + '/project.qgs'

project_instance = QgsProject.instance()
project_instance.setFileName(project_path)
project_instance.read()

authMgr = QgsApplication.authManager()
if authMgr.authenticationDatabasePath():
   # already initilised => we are inside a QGIS app.
   msg = 'Inside QGIS'
else:
   # outside qgis, e.g. in a testing environment => setup env var before
   # db init
   os.environ['QGIS_AUTH_DB_DIR_PATH'] = "Path/qgis-auth.db"
   msg = 'Master password could not be set'
   assert authMgr.setMasterPassword("password", True), msg
   authMgr.init( " Path /qgis-auth.db" )

manager = QgsProject.instance().layoutManager()
timestr = time.strftime("%Y%m%d-%H%M%S")

layout = manager.layoutByName("layout ") # name of the layout
# or layout = manager.layouts()[0] # first layout

exporter = QgsLayoutExporter(layout)
exporter.exportToPdf(project_instance.absolutePath() + "/layout-" + timestr + ".pdf",
                     QgsLayoutExporter.PdfExportSettings())

app.exitQgis()

Thanks,

Paul Wittle
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Business Solutions Analyst (GIS)
ICT Operations
Dorset Council
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