Hi,
This is the code I use (since some years ago...) to write styles from
all layers to the database:
mapGeometryType = {
0: "Point",
1: "Line",
2: "Polygon",
3: "UnknownGeometry",
4: "NullGeometry",
}
layers = QgsProject.instance().mapLayers()
forlayer inlayers.values():
iflayer.type() == QgsMapLayer.VectorLayer:
ifmapGeometryType[layer.geometryType()] != "NullGeometry":
layer.deleteStyleFromDatabase
layer.saveStyleToDatabase(name=layer.name(),description="Default style
for {}".format(layer.name()), useAsDefault=True, uiFileContent="")
Since we are writing all with the flag "default style" there is no need
to load them when opening the project.
Regards,
Jorge Gustavo
On 07/04/25 19:11, Ludwig Kniprath via QGIS-User wrote:
Hello Peter,
everything that users do in QGis can be done by Python scripts,
including your steps listed below.
There are some difficulties for the desired "one step" solution, f. e.
the name of the file-based layer must be converted in a valid and
unique postgis table-name, the fields of the file-based layer must be
stored with valid postgis field-types and -names and so on...
Taking into account all special features, exceptions and necessary
settings, this results in a rather complex program, the implementation
of which may be more complex than the manual implementation in QGis...
Just my two cents...
Ludwig
Am 07.04.25 um 08:45 schrieb peter.berger--- via QGIS-User:
There are serveral steps necessary to store from QGIS a vector layer
with his style in a postgres DB. For a big amout of layers this is
impracticaI.
Therfore I would do this in one step from QGIS. Is this in any way
possible?
*Peter Berger*
Brunnwiesenstrasse 62
8049 Zürich
Schweiz
mobile +41 79 301 71 54
The several step procedure:
·*Load the layer*: Import the layer from a vector file into QGIS.
·*Rename (if necessary)*: Give the layer an appropriate name.
· *Transfer the layer to Postgres*: Drag the layer into the
PostgreSQL database. You will find it there with the specific name.
· *Load the layer from Postgres*: Import it back from the PostgreSQL
database into QGIS.
· *Assign the style*: Copy the style from the original layer and
assign it to the Postgres layer loaded in QGIS.
· *Export the style*: Export the style of the Postgres layer. You
will now find an option to save the style with the exact name of the
layer in the PostgreSQL database.
· *Delete old layers and reload*: Delete all associated layers and
reload the layer from the PostgreSQL database.
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