Struct EntityQuery 

pub struct EntityQuery {
    pub entity_type: String,
    pub filters: Vec<QueryFilter>,
    pub order_by: Option<(String, SortOrder)>,
    pub limit: Option<usize>,
    pub offset: Option<usize>,
}

Query filter for entities.

Build queries using the builder methods:

use chainindex_core::entity::{EntityQuery, QueryFilter, SortOrder};

let query = EntityQuery::new("erc20_transfer")
    .filter(QueryFilter::Eq("from".into(), serde_json::json!("0xAlice")))
    .order_by("block_number", SortOrder::Desc)
    .limit(10);

Fields

entity_type: String

The entity type to query.

filters: Vec<QueryFilter>

Filters to apply.

order_by: Option<(String, SortOrder)>

Sort order.

limit: Option<usize>

Maximum number of results.

offset: Option<usize>

Number of results to skip.

Implementations

impl EntityQuery

pub fn new(entity_type: impl Into<String>) -> Self

Create a new query for the given entity type.

pub fn filter(self, f: QueryFilter) -> Self

Add a filter to the query.

pub fn order_by(self, field: impl Into<String>, order: SortOrder) -> Self

Set the sort order.

pub fn limit(self, n: usize) -> Self

Set the maximum number of results.

pub fn offset(self, n: usize) -> Self

Set the offset (number of results to skip).

Trait Implementations

impl Clone for EntityQuery

fn clone(&self) -> EntityQuery

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EntityQuery

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

Formats the value using the given formatter.

impl Default for EntityQuery

fn default() -> EntityQuery

Returns the “default value” for a type.