GraphQL RFC Tracker

RFC 2 / Draft

Fragment arguments/variables (syntax/validation/execution)

Opened on2023-01-02
Closed on2026-03-08

At a glance

Spec PR description

This spec contains amendments to https://github.com/graphql/graphql-spec/pull/1010, a diffed view is available at https://github.com/mjmahone/graphql-spec/pull/3.

These amendments are made from comments on the implementation PR and alterations from the new implementation

In general the biggest changes are that we introduce fragmentVariableValues which will be on the groupedFieldSet, these are derived from the arguments in scope of the fragmentDefinition where this field is used.

We introduce localFragmentVariables which as we are traversing down fragment-spreads are a coerced set of variables i.e.

query($b: String!, $c: String!) {
  field3(b: $b) ## uses b from variable-values
  ...A(a: "A", b: "B")
}

fragment A($a: String!, $b: String!) on X {
  field(a: $a) ## uses $a from localVariableValues
  field2(c: $c) ## we have access to variableValues so we take c from there
  ...B(b: $b) ## uses $b from localVariableValues
}

fragment B($b: String!) on X {
  ## This fragment has access to $b and $c but not to $a
  field4(b: $b) ## uses $b from localVariableValues
}

Last but not least we introduce getArgumentValuesFromSpread which looks at the spread and fragment-definition and establishes a coerced set of localVariableValues.

Timeline