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RuntimeError: A column was specified that does not exist. How to find which field
#: the fields in the feature class
actual = set([str(x.name) for x in arcpy.ListFields(r'')])
#: the fields you are trying to use
expected = set([])
fouled_up = expected - actual
import arcpy
import os
test_location = 'c:\\temp'
gdb_name = 'inspecific_error'
gdb_path = os.path.join(test_location, gdb_name) + '.gdb'
table_name = 'tell_me_the_column_name'
table_path = os.path.join(gdb_path, table_name)
fouled_up_fields = ['test', 'this_one']
if not os.path.exists(test_location):
os.makedirs(test_location)
arcpy.CreateFileGDB_management(test_location, gdb_name, 'CURRENT')
arcpy.CreateTable_management(gdb_path, table_name)
arcpy.AddField_management(table_path, 'test', 'TEXT')
try:
with arcpy.da.SearchCursor(table_path, fouled_up_fields) as cursor:
for row in cursor:
continue
except RuntimeError as e:
print 'tell me which one is missing!!'
print e
print 'oh thanks, not useful'
#: the fields in the feature class
actual = set([str(x.name) for x in arcpy.ListFields(table_path)])
#: the fields you are trying to use
my_silly_input = set(fouled_up_fields)
missing = my_silly_input - actual
print 'the fouled up columns are {}'.format(missing)
@jannefleischer

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jannefleischer commented Jan 17, 2019

In case anyone is googleing its way here: I created a bunch of foul fields by doing a join with arcpy.AddJoin and then use arcpy.FeatureClassToFeatureClass to make the join permanent. That seemed to be the wrong way. I only could fix my foul fields by joining via arcpy.JoinField instead (better way, anyway...).

@steveoh: Thanks to pointing out that there is an issue with foul fields. I've gotten almost crazy over this...

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