23 lines
870 B
Rust
23 lines
870 B
Rust
use crate::validation::visitor::{Visitor, VisitorContext};
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use graphql_parser::query::Field;
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#[derive(Default)]
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pub struct ScalarLeafs;
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impl<'a> Visitor<'a> for ScalarLeafs {
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fn enter_field(&mut self, ctx: &mut VisitorContext<'a>, field: &'a Field) {
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if let Some(ty) = ctx.parent_type() {
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if let Some(schema_field) = ty.field_by_name(&field.name) {
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if let Some(ty) = ctx.registry.basic_type_by_typename(&schema_field.ty) {
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if ty.is_leaf() && !field.selection_set.items.is_empty() {
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ctx.report_error(vec![field.position], format!(
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"Field \"{}\" must not have a selection since type \"{}\" has no subfields",
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field.name, ty.name()
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))
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}
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}
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}
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}
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}
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}
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