Struct Schema 

pub struct Schema { /* private fields */ }

What an expression may refer to.

use ravenrs_criteria::{Criteria, FieldType, Schema, validate};

let schema = Schema::new().field("Price", FieldType::Number).field("Name", FieldType::Text);
let ok = Criteria::parse("[Price] > 10").expect("valid");
assert!(validate(&ok, &schema).is_empty());
let bad = Criteria::parse("[Prize] > 10 And Upper([Price]) = 'X'").expect("valid");
assert_eq!(validate(&bad, &schema).len(), 1, "the misspelled field");

Implementations

impl Schema

pub fn new() -> Self

An empty schema.

pub fn field(self, path: &str, kind: FieldType) -> Self

Adds a field; a dotted path reads a nested value.

pub fn collection(self, path: &str, rows: Schema) -> Self

Adds a nested collection with the schema of its rows.

pub fn parameter(self, name: &str, kind: FieldType) -> Self

Adds a parameter.

pub fn function(self, name: &str) -> Self

Declares a custom function.

Trait Implementations

impl Clone for Schema

fn clone(&self) -> Schema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Schema

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

Formats the value using the given formatter.

impl Default for Schema

fn default() -> Schema

Returns the “default value” for a type.