Updating records using cursors

Posted by / 28-Jan-2018 05:11

= Name WHEN NOT MATCHED THEN INSERT (ID, Name) VALUES (Id, Name) , once completed, in order to be able to see this in the database.To actually answer your question I would do it something like as follows.There can be a situation where you have to use a cursor, even though the experts say not to use cursors or to avoid them as much as possible.But if you look closely, most of the time we use cursors to iterate through a row collection and update the same table.

We will need to create three layouts for our project Layout 1: activity_This layout holds all the records and an Add button to add records.

When you open a discriminated cursor, subsequent cursor operations are limited to records or key-value pairs that are equal to, greater than, or greater than or equal to a specified key (depending on DBRead Flags settings).

When you open an unfiltered cursor, subsequent cursor operations apply to the entire database—all records or key-value pairs. Select[Async], subsequent cursor operations are limited to records or key-value pairs with keys that are greater than the passed key. If there is no match, positions the cursor on the first record or key-value pair whose key is greater than the specified key. Select[Async], subsequent cursor operations are limited to records or key-value pairs with keys that are greater than or equal to the passed key.

I think its finidng the first match and writing that value over and over, but I want it to look at the value in the field my search cursor is set to, and then find the match in the list and write that out to the two fields. import arcpy, os photos_path = r'P:\Records\GIS\Projects\D04_OHS\Overhead Sign Structure Pics' OHS_FC = r'D:\Records\GIS\Projects\D04_OHS\D04_OHS.gdb\D04_OHS' ID_fld = 'OSMI_ID' file_nm_fld = 'LINK_FILENAME' path_fld ='LINK_PATH' photos_list = [] for dirpath, dirnames, filenames in os.walk(photos_path): for filename in filenames: full Path = dirpath '\' filename if full Path not in photos_list: photos_list.append(full Path) arcpy. Update Cursor(OHS_FC,file_nm_fld) updt_cursor_fp = Update Cursor(OHS_FC,path_fld) for row in srch_cursor: val = str(row[0]) for p in photos_list: f_name, f_path = split(p) if val in p: #print val for u_row1 in updt_cursor_fn: u_row1[0] = f_name updt_cursor_fn.update Row(u_row1) for u_row2 in updt_cursor_fp: u_row2[0] = f_path updt_cursor_fp.update Row(u_row2) You don't need the search cursor or the separate update cursors.

Add Field_management(OHS_FC,file_nm_fld,'TEXT',100) arcpy. Add Field_management(OHS_FC,path_fld,'TEXT',300) srch_cursor = Simply use a single update cursor and use that to both find the match and update the fields.

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Make sure to add all the fields you will need to the update cursor.

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