Enum elasticsearch_dsl::search::queries::params::ScriptLang

pub enum ScriptLang {
    Painless,
    Expression,
    Mustache,
    Custom(String),
}

Available scripting language

Variants

Painless

Painless is a performant, secure scripting language designed specifically for Elasticsearch. You can use Painless to safely write inline and stored scripts anywhere scripts are supported in Elasticsearch.

Painless provides numerous capabilities that center around the following core principles:

• Safety: Ensuring the security of your cluster is of utmost importance. To that end, Painless uses a fine-grained allowlist with a granularity down to the members of a class. Anything that is not part of the allowlist results in a compilation error. See the Painless API Reference for a complete list of available classes, methods, and fields per script context.

• Performance: Painless compiles directly into JVM bytecode to take advantage of all possible optimizations that the JVM provides. Also, Painless typically avoids features that require additional slower checks at runtime.

• Simplicity: Painless implements a syntax with a natural familiarity to anyone with some basic coding experience. Painless uses a subset of Java syntax with some additional improvements to enhance readability and remove boilerplate.

https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-scripting-painless.html

Expression

Lucene’s expressions compile a javascript expression to bytecode. They are designed for high-performance custom ranking and sorting functions and are enabled for inline and stored scripting by default.

https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-scripting-expression.html

Mustache

A template language to search with templates

https://www.elastic.co/guide/en/elasticsearch/reference/current/search-template.html

Custom(String)

Custom language refer to Advanced scripts using script engines

Trait Implementations

impl Clone for ScriptLang

fn clone(&self) -> ScriptLang

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScriptLang

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> From<T> for ScriptLangwhere
    T: ToString,

fn from(value: T) -> Self

Converts to this type from the input type.

impl PartialEq<ScriptLang> for ScriptLang

fn eq(&self, other: &ScriptLang) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ScriptLang

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>where
    S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ScriptLang

impl StructuralEq for ScriptLang

impl StructuralPartialEq for ScriptLang