topic Re: problems with layer.findAndReplaceWorkspacePath in Python Questions

problems with layer.findAndReplaceWorkspacePath

JoshuaChan — Fri, 11 May 2012 17:34:27 GMT

I have a bunch of .lyr files that point to a directory that's been moved.
I'm trying to programmatically re-link them to the new location (hopefully to a UNC location like \\server\folder instead of W:\folder)

so my code looks like this:

import arcpy, sys, os, fnmatch

dir = sys.argv[1]   # directory to search
old = sys.argv[2]   # old feature class path/name to replace
new = sys.argv[3]   # new feature class path/name

# go to the directory and get a list of the files 
filelist = os.listdir(dir)

# get that file list and for each name....
for filename in filelist: 
    # look for any .lyr files
    if fnmatch.fnmatch(filename, '*.lyr'):
        arcpy.AddMessage(filename + " is a layer file")
        # create a layer object from the .lyr file
        lyrfile = arcpy.mapping.Layer(dir + '\\' + filename)
        arcpy.AddMessage(filename + " is now a layer object")
        arcpy.AddMessage(old)
        arcpy.AddMessage(new)
        lyrfile.findAndReplaceWorkspacePath(old, new)
        arcpy.AddMessage("fixed data source")
        
arcpy.AddMessage("finito!!!")
del filename, filelist, dir, old, new, lyrfile

but when I run it - I get messages saying that something is happenning (all my addMessages). But when it comes to actually re-mapping my datasource, well, nothing happens. When I re-add the .lyr files to my mxd and check the data source, it doesn't change. It's still the old datasource.

any help???

Re: problems with layer.findAndReplaceWorkspacePath

JoshuaChan — Sat, 11 Dec 2021 14:09:38 GMT

looks like I forgot to save

lyrfile.save()

I have a bunch of .lyr files that point to a directory that's been moved.
I'm trying to programmatically re-link them to the new location (hopefully to a UNC location like \\server\folder instead of W:\folder)

so my code looks like this:
import arcpy, sys, os, fnmatch

dir = sys.argv[1]   # directory to search
old = sys.argv[2]   # old feature class path/name to replace
new = sys.argv[3]   # new feature class path/name

# go to the directory and get a list of the files 
filelist = os.listdir(dir)

# get that file list and for each name....
for filename in filelist: 
    # look for any .lyr files
    if fnmatch.fnmatch(filename, '*.lyr'):
        arcpy.AddMessage(filename + " is a layer file")
        # create a layer object from the .lyr file
        lyrfile = arcpy.mapping.Layer(dir + '\\' + filename)
        arcpy.AddMessage(filename + " is now a layer object")
        arcpy.AddMessage(old)
        arcpy.AddMessage(new)
        lyrfile.findAndReplaceWorkspacePath(old, new)
        arcpy.AddMessage("fixed data source")
        
arcpy.AddMessage("finito!!!")
del filename, filelist, dir, old, new, lyrfile        
but when I run it - I get messages saying that something is happenning (all my addMessages). But when it comes to actually re-mapping my datasource, well, nothing happens. When I re-add the .lyr files to my mxd and check the data source, it doesn't change. It's still the old datasource.

any help???

Re: problems with layer.findAndReplaceWorkspacePath

JoshuaChan — Fri, 11 May 2012 19:11:10 GMT

Is there any difference when working with shapefiles? So far my script doesn't seem to like shapefiles.
(changing from C:\folder\shapefile.shp to \\server\folder\shapefile.shp)

looks like I forgot to save

lyrfile.save()

Re: problems with layer.findAndReplaceWorkspacePath

JeffBarrette — Sat, 11 Dec 2021 14:09:41 GMT

This script works fine when run from IDLE (or from the Python window):

import arcpy
layer1 = arcpy.mapping.Layer(r"C:\Temp\NE_States.lyr")
layer1.findAndReplaceWorkspacePath(r"C:\Temp", r"\\JBarrette\Temp")
layer1.saveACopy(r"C:\Temp\NE_States2.lyr")
print layer1.dataSource

>>\\Jbarrette\Temp\NE_Lakes.shp

Are you attempting to change the dataset name in any way? FindAndReplaceWorkspacePath only works on the workspace path.

Jeff

Re: problems with layer.findAndReplaceWorkspacePath

JoshuaChan — Sat, 11 Dec 2021 14:09:44 GMT

no I was running the script from arctoolbox

I thought I had this figured out but now when I run it ArcGIS crashes. Doesn't matter if it's ArcCatalog or ArcMap.

This script works fine when run from IDLE (or from the Python window):
import arcpy
layer1 = arcpy.mapping.Layer(r"C:\Temp\NE_States.lyr")
layer1.findAndReplaceWorkspacePath(r"C:\Temp", r"\\JBarrette\Temp")
layer1.saveACopy(r"C:\Temp\NE_States2.lyr")
print layer1.dataSource

>>\\Jbarrette\Temp\NE_Lakes.shp
Are you attempting to change the dataset name in any way? FindAndReplaceWorkspacePath only works on the workspace path.

Jeff