Creating a new field having the same type as selected field?

Question

I set up a QgsFieldComboBox for a Plugin. I know I can read the selected fieldname the following:

self.dlg.MyQgsFieldComboBox.currentField()

Studying the docs, I cannot find an option to read the currentFieldType() directly. So I know I can get field types of my selected layer the following:

self.mylayerfieldtypes = [field.typeName() for field in self.myselectedlayer.fields()]

I could stitch this together the following, to get the field type only of my selected field:

myfieldname = self.dlg.MyQgsFieldComboBox.currentField()

for field in self.myselectedlayer.fields():
   if field.name() == myfieldname:
       myfieldtype = field.typeName()

But my issue now is, when creating a new layer having a field with the same type as my selected field, I cannot just use myfieldtype for it like

QgsField("MyNewFieldHavingTheSameTypeAsMyOldField", myfieldtype)

How can I create a new field, having the same type as my selected field? Copying the field to my new layer is not an option.

Answer 1

Sometimes the answer is just too simple: instead of field.typeName() just use field.type().

myfieldname = self.dlg.MyQgsFieldComboBox.currentField()

for field in self.myselectedlayer.fields():
   if field.name() == myfieldname:
       myfieldtype = field.type()
QgsField("MyNewFieldHavingTheSameTypeAsMyOldField", myfieldtype)