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I have got a few layers, in which the data attribute table looks exactly the same including:

  • Type (string)
  • Address (string)
  • Postcode (string)
  • X (East) (decimal)
  • Y (north (decimal)
  • Latitude (decimal)
  • Longitude (decimal)
  • ObjectID (string)
  • length (meters) (decimal)

I have to create them every time for every single layer. Is there any way to make them loaded instantly as a blank data attribute table for the layer I want?

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  • Are you creating the features later on, or do you just fill in the "blanks"?
    – Erik
    Commented Sep 25, 2020 at 11:36

2 Answers 2

Reset to default
4

You can execute the following code in the QGIS Python console to create a table and add it to the QGIS project.

For the example, this is a temporary layer with a Polygon geometry which will be called layer_name.

your_layer = QgsVectorLayer("Polygon", "layer_name", "memory")
prov = your_layer.dataProvider()

prov.addAttributes([QgsField("Type", QVariant.String),
QgsField("Address",  QVariant.String),
QgsField("Postcode", QVariant.String),
QgsField("X", QVariant.Double),
QgsField("Y", QVariant.Double),
QgsField("Latitude", QVariant.Double),
QgsField("Longitude", QVariant.Double),
QgsField("ObjectID", QVariant.String),
QgsField("Length", QVariant.Double)])


your_layer.updateFields()
QgsProject.instance().addMapLayer(your_layer)
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  • It's fine, but this code creates a separate layer for me. I have got existing layers already.
    – Geographos
    Commented Sep 28, 2020 at 13:42
3

If you are open to a small python script, here you go:

from qgis.PyQt.QtCore import QVariant
from qgis.core import QgsField
from qgis.utils import iface

x = 20
y = 2

attributes = [QgsField("Type", QVariant.String, len=x),
              QgsField("Address", QVariant.String, len=x),
              QgsField("Postcode", QVariant.String, len=x),
              QgsField("X", QVariant.Double, len=x, prec=y),
              QgsField("Y", QVariant.Double, len=x, prec=y),
              QgsField("Latitude", QVariant.Double, len=x, prec=y),
              QgsField("Longitude", QVariant.Double, len=x, prec=y),
              QgsField("ObjectID", QVariant.Double, len=x, prec=y),
              QgsField("length", QVariant.Double, len=x, prec=y)]

layer = iface.activeLayer()
layer.dataProvider().addAttributes(attributes)
layer.updateFields()

edit: PS : iface.activeLayer() gets the selected layer from the legend

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2
  • Could also be done by a model incorporating refactor fields, but neither would be necessary, if @MKR creates the layer from scratch, then he'd simply create an empty template and copy it.
    – Erik
    Commented Sep 25, 2020 at 11:56
  • @Erik i answer with this because it works both for new layers and layers with fields already, sure there are better way to do this but i think that's enought. especially if you just want to add a few attributes on the fly
    – Kalak
    Commented Sep 25, 2020 at 12:55

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