I am working in ArcGIS 10.1 SP 1 on Windows Server 2008 R2 Enterprise.I created a python toolbox that is opened from a python addin and displays records from a feature class in a value table. It allows users to change values (by reordering the records) or delete records in that feature class. I would like the tool to open and display the records that are currently in the feature class. It does this the first time it is opened and completes the edits, however, when I launch the tool again, the value table does not refresh to reflect the changes to the feature class. Instead, the records(and their values) that were in the feature class prior to any changes and tool execution are shown in the value table.I have tried calling the getParameterInfo() method from various places in the code with no luck. The only way I can get it to update is to manually refresh the python toolbox in ArcCatalog. Any help is appreciated. class Toolbox(object):
def __init__(self):
"""Define the toolbox (the name of the toolbox is the name of the
.pyt file)."""
self.label = "Toolbox"
self.alias = ""
# List of tool classes associated with this toolbox
self.tools = [ReorderPages]
class ReorderPages(object):
# TODO How to refresh parameter list
def __init__(self):
"""Define the tool (tool name is the name of the class)."""
self.label = "Reorder Pages"
self.description = ""
self.canRunInBackground = False
def getParameterInfo(self):
"""Define parameter definitions"""
params = []
mxd = arcpy.mapping.MapDocument("CURRENT")
param0 = arcpy.Parameter(
displayName = 'Pages',
name = 'pages',
datatype = 'GPValueTable',
parameterType = 'Optional',
direction = 'Input'
)
param0.columns = [['String', 'Map Page']]
gridFc = os.path.dirname(mxd.filePath) + r"\SourceData.gdb\Grid_Index"
param0.values = sorted([[r[0] + " pg. " + str(r[1])] for r in arcpy.da.SearchCursor(gridFc, ["MXD_NAME", "PAGE_NUM"])])
params = [param0]
return params
def isLicensed(self):
"""Set whether tool is licensed to execute."""
return True
def updateParameters(self, parameters):
"""Modify the values and properties of parameters before internal
validation is performed. This method is called whenever a parameter
has been changed."""
pass
def updateMessages(self, parameters):
"""Modify the messages created by internal validation for each tool
parameter. This method is called after internal validation."""
pass
def getNewIndex(self, map_name, pos_list):
# Get a single map name and the updated position list from the user
# to create a dictionary holding the map names (e.g. "Timber Sales Map pg. 1")
# and the user specified position relative to other maps of the same name.
# The format will be {"Timber Sales Map pg. 1: 3, "Timber Sales Map pg. 2: 2, ...}
list_by_map = [mp.strip("'") for mp in pos_list if mp and re.match(map_name, mp)]
dict_by_map = {m: list_by_map.index(m) + 1 for m in list_by_map}
return dict_by_map
def getMapNames(self, index_feature):
search_nms = arcpy.da.SearchCursor(index_feature, ["MXD_NAME"])
names = []
for record in search_nms:
names.append(record[0])
map_list = list(set(names))
del record, search_nms, names
return map_list
def updateIndex(self, index_feature, pos_list):
map_set = self.getMapNames(index_feature)
for mp in map_set:
expr = "MXD_NAME = '" + mp + "'"
new_pos = self.getNewIndex(mp, pos_list)
update_indx = arcpy.da.UpdateCursor(index_feature, ["MXD_NAME", "PAGE_NUM"], expr)
for ind_rec in update_indx:
map_page = ind_rec[0] + " pg. " + str(ind_rec[1])
if map_page in pos_list:
ind_rec[1] = new_pos[map_page]
update_indx.updateRow(ind_rec)
else:
update_indx.deleteRow()
del ind_rec, update_indx
del map_set
def execute(self, parameters, messages):
"""The source code of the tool."""
new_list = parameters[0].valueAsText
pg_list = new_list.split(";")
pg_clean = [m.strip("'") for m in pg_list]
mxd = arcpy.mapping.MapDocument("CURRENT")
path = os.path.dirname(mxd.filePath)
grid_fc = path + r"\SourceData.gdb\Grid_Index"
self.updateIndex(grid_fc, pg_clean)
del mxd, new_list, pg_list, pg_clean, grid_fc, path
