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Writing custom validators for Formalchemy is simple. During the validation of SOMEFIELD I can access another fields value using field.parent.SOMEOTHERFIELD.value.
Is it possible to change SOMEOTHERFIELD’s value during the validation of SOMEFIELD? Or should I separate changing related field values from the validation process altogether?
gawel’s answer was a step but did not solve my problem (see comment under his answer). I changed the value of
field.parent.model.SOMEOTHERFIELDbut the change was not committed to the db withsession.commit().After trying out many things I found out that you must use
fieldset.sync()beforefield.parent.model.SOMEOTHERFIELD = value. Only then the change is committed.