If Field Exists (ModelBuilder)

Summary

Evaluates if the input data has the specified fields.

Learn how If Field Exists works in ModelBuilder

Usage

• This tool is intended for use in ModelBuilder, not in Python scripting.

• The tool has two Boolean outputs, True and False. Based on the condition being evaluated, one of the two Boolean outputs is true and the other is false after the tool runs. These Boolean outputs must be set as a precondition to the downstream tools for those to execute if either of the preconditions is true.

Syntax

arcpy.mb.FieldExistsIfThenElse(in_table, {field_test_type}, field)

Parameter	Explanation	Data Type
in_table	Input table that will be evaluated for the existence of the specified fields.	Table View; Raster Layer; Mosaic Layer
field_test_type (Optional)	The criteria to test the specified list of fields against. MUST_HAVE_ALL_FIELDS —All fields must exists. MUST_HAVE_AT_LEAST_ONE_FIELD —Must have at least one of the specified fields. MUST_NOT_HAVE_ALL_FIELDS —Must not have any of the specified fields. MUST_NOT_HAVE_AT_LEAST_ONE_FIELD —Must not have at least one of the specified fields.	String
field [field,...]	Field names to check for in the input table.	String

Derived Output

Name	Explanation	Data Type
true	If the specified criteria evaluates to True, this parameter will be set to True.	Boolean
false	If the specified criteria evaluates to False, this parameter will be set to True.	Boolean

Environments

This tool does not use any geoprocessing environments.

Licensing information

• Basic: Yes
• Standard: Yes
• Advanced: Yes