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Class FieldExpression allows you to compute customized content snippets for each result returned by a search.
FieldExpression is defined in the module google.appengine.api.search.
The constructor for class FieldExpression is defined as follows:
class FieldExpression(name, expression)
Construct an instance of class FieldExpression.
For example,
FieldExpression(name='content_snippet',
expression='snippet("very important", content)')
constructs a field expression that returns a computed field named content-snippet with each search result, containing HTML snippets of the content field that match the query "very important".
Arguments
Name of computed field.
Expression to evaluate and return.
Result value
A new instance of class FieldExpression.
Exceptions
A parameter has an invalid type, or an unknown attribute was passed.
A parameter has an invalid value.
An instance of class FieldExpression has the following properties:
Name of computed field.
String containing expression to evaluate and return.
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Last updated 2025-08-07 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["`FieldExpression` enables the computation of custom content snippets for each search result."],["This API is available for first-generation runtimes and is applicable when upgrading to second-generation runtimes."],["The `FieldExpression` constructor takes a `name` for the computed field and an `expression` to define how the content is generated."],["The properties `name` and `expression` hold the name of the computed field and the string defining its expression, respectively."],["`FieldExpression` will raise a TypeError or ValueError exception if invalid types or values are passed during instantiation."]]],[]]
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