Merge_management and fieldmappings problem

Chris_Matthews

I am using arcpy.Merge_management to combine 4 CSV files into SDE. I attempting to use fieldmappings to rename the field headers, and this is causing it to crash. I've not used fieldmapping with more than two datasets simaltaneously before...

The error is trapped by the try loop, but is returning no information. Any help would be appreciated.

try:

    if booContinue == True:

        fieldmappings = arcpy.FieldMappings()

        fieldmap1 = arcpy.FieldMap()

        fieldmappings.addTable(rg_Layer)

        fieldmappings.addTable(ox_Layer)

        fieldmappings.addTable(sn_Layer)

        fieldmappings.addTable(sp_Layer)

        fieldmap1.addInputField(rg_Layer,"field1")

        fieldmap1.addInputField(ox_Layer,"field1")

        fieldmap1.addInputField(sn_Layer,"field1")

        fieldmap1.addInputField(sp_Layer,"field1")

        fieldout1 = fieldmap1.outputField

        fieldout1.name = "PCODE"

        fieldmap1.outputField = fieldout1

        fieldmappings.addFieldMap(fieldmap1)

       

        arcpy.Merge_management([rg_Layer,ox_Layer,sn_Layer,sp_Layer], pc_layer, fieldMappings)

        msg = msg + "\n" + outname + " created"

except:

    msg = msg + "\n" + "error creating " + outname + " - " + "\n" + arcpy.GetMessages(2)

    booContinue = False

Chris_Matthews

I've managed to get the Field_Mapping working, but as a massively complex (hard to read) parameter to the Merge_management tool - see below, so it does seem that it is possible to use field mapping with CSVs.

arcpy.Merge_management("rg_Layer;ox_Layer;sn_Layer;sp_Layer", GISLive_GISADMIN_AA_TEST_70, "Postcode \"Postcode\" true true false 255 Text 0 0 ,First,#,rg_Layer,Field1,-1,-1,ox_Layer,Field1,-1,-1,sn_Layer,Field1,-1,-1,sp_Layer,Field1,-1,-1;Quality \"Quality\" true true false 4 Long 0 0 ,First,#,rg_Layer,Field2,-1,-1,ox_Layer,Field2,-1,-1,sn_Layer,Field2,-1,-1,sp_Layer,Field2,-1,-1;POBox \"POBox\" true true false 255 Text 0 0 ,First,#,rg_Layer,Field3,-1,-1,ox_Layer,Field3,-1,-1,sn_Layer,Field3,-1,-1,sp_Layer,Field3,-1,-1;TotalDPS \"TotalDPS\" true true false 4 Long 0 0 ,First,#,rg_Layer,Field4,-1,-1,ox_Layer,Field4,-1,-1,sn_Layer,Field4,-1,-1,sp_Layer,Field4,-1,-1;ResDPS \"ResDPS\" true true false 4 Long 0 0 ,First,#,rg_Layer,Field6,-1,-1,ox_Layer,Field6,-1,-1,sn_Layer,Field6,-1,-1,sp_Layer,Field6,-1,-1;ComDPS \"ComDPS\" true true false 4 Long 0 0 ,First,#,rg_Layer,Field7,-1,-1,ox_Layer,Field7,-1,-1,sn_Layer,Field7,-1,-1,sp_Layer,Field7,-1,-1;POBoxDPS \"POBoxDPS\" true true false 4 Long 0 0 ,First,#,rg_Layer,Field8,-1,-1,ox_Layer,Field8,-1,-1,sn_Layer,Field8,-1,-1,sp_Layer,Field8,-1,-1;Matched \"Matched\" true true false 4 Long 0 0 ,First,#,rg_Layer,Field9,-1,-1,ox_Layer,Field9,-1,-1,sn_Layer,Field9,-1,-1,sp_Layer,Field9,-1,-1;Unmatched \"Unmatched\" true true false 4 Long 0 0 ,First,#,rg_Layer,Field10,-1,-1,ox_Layer,Field10,-1,-1,sn_Layer,Field10,-1,-1,sp_Layer,Field10,-1,-1;XCoord \"XCoord\" true true false 4 Long 0 0 ,First,#,rg_Layer,Field11,-1,-1,ox_Layer,Field11,-1,-1,sn_Layer,Field11,-1,-1,sp_Layer,Field11,-1,-1;YCoord \"YCoord\" true true false 4 Long 0 0 ,First,#,rg_Layer,Field12,-1,-1,ox_Layer,Field12,-1,-1,sn_Layer,Field12,-1,-1,sp_Layer,Field12,-1,-1;PCType \"PCType\" true true false 255 Text 0 0 ,First,#,rg_Layer,Field19,-1,-1,ox_Layer,Field19,-1,-1,sn_Layer,Field19,-1,-1,sp_Layer,Field19,-1,-1")