postrust_graphql/
error.rs

1//! GraphQL-specific error types.
2
3use thiserror::Error;
4
5/// Errors that can occur during GraphQL operations.
6#[derive(Debug, Error)]
7pub enum GraphQLError {
8    /// The schema could not be built from the database's metadata. A fault in
9    /// the translation, not in the request: no query has been seen yet.
10    #[error("Schema generation failed: {0}")]
11    SchemaGeneration(String),
12
13    /// The built schema was rejected, or a lookup into it failed.
14    #[error("Schema error: {0}")]
15    SchemaError(String),
16
17    /// The query parsed and resolving it failed.
18    #[error("Query execution failed: {0}")]
19    QueryExecution(String),
20
21    /// A `where` argument that does not describe a filter this server can
22    /// express -- an unknown operator, or an operand of the wrong shape.
23    #[error("Invalid filter: {0}")]
24    InvalidFilter(String),
25
26    /// A PostgreSQL type with no GraphQL equivalent to map it onto.
27    #[error("Type mapping error: {0}")]
28    TypeMapping(String),
29
30    /// The field needs an identity and the request carried none.
31    #[error("Authentication required")]
32    AuthenticationRequired,
33
34    /// PostgreSQL refused the query. Its message is carried verbatim.
35    #[error("Database error: {0}")]
36    Database(String),
37}
38
39/// `Result` with this crate's error type as the default failure.
40pub type Result<T> = std::result::Result<T, GraphQLError>;
postrust_graphql/error.rs

postrust_graphql/
error.rs
