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Fragment args 2024 amendments #1081
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Fragment args 2024 amendments #1081
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This is clear to me :)
Very excited to see progress, and thank you for cleaning up and clarifying the PR!
spec/Section 5 -- Validation.md
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@@ -1563,12 +1636,36 @@ fragment HouseTrainedFragment on Query { | |||
} | |||
``` | |||
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Likewise, it is valid for both an operation and a fragment to define a variable |
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nit: maybe say "for a fragment to define a variable with a name that is also defined on an operation" to disambiguate that we don't mean fragments and operations can define two of the same variable within a single definition
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Addressed in 48fa841, does that sound better?
spec/Section 2 -- Language.md
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Variables can be used within fragments. Operation-defined variables have global | ||
scope with a given operation, so a variable used within a fragment must either | ||
be declared in any top-level operation that transitively consumes that fragment, |
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The sentence would flow better if we do something like this --
Operation-defined variables have... Fragment-defined variables have ... So a variable used within a fragment must ...
Thoughts?
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That sounds great, what do you think about 5a73543
spec/Section 5 -- Validation.md
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- Let {spreadsForName} be the set of fragment spreads with a given name in | ||
{visitedSelections}. | ||
- Given each pair of members {spreadA} and {spreadB} in {spreadsForName}: | ||
- {spreadA} and {spreadB} must have identical sets of arguments. |
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Should we specify "must have identical sets of arugments and values?"
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and directives?
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I actually hadn't thought about directives, that's a great point! Addressed in 48fa841
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@graphql/tsc is there anything I can do to move this forward? |
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It feels like section 2 should comment on the fact that shadowed variables may not be referenced implicitly by child fragment spreads. (This is probably not the right way of saying that!) E.g. in the following query, Forbidden
is spread inside of F
and attempts to use variable $a
which is ambiguous, and hence not permitted.
query Q($a: Int!, $b: Int!) {
...F(a: 7)
}
fragment F($a: Int!) {
...Fine
...Forbidden
}
fragment Fine {
b: echo(input: $b)
}
fragment Forbidden {
a: echo(input: $a)
}
@benjie from a purely technical perspective I agree, I was approaching that more from a backwards compatibility perspective. The Fragments variables are only applicable within the context of a i.e.
This also makes Fragment-Arguments easier to reason about for me atleast as it's either the Variables passed into the definition or from the operation itself. |
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I haven't got as far as section 6 yet.
@JoviDeCroock Ah! I thought we landed on the other side with this one, this does simplify things significantly because we can look at fragments in isolation 👍 |
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Great work Jovi! Here's a few comments, but this was only a quick review so it's not exhaustive.
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@JoviDeCroock did you rebase on a different computer? Often this happens when |
@benjie I did not, the commits it points at are code-suggestions I applied so maybe it's not good at the co-authored ones? Not sure 😅 can rebase to fix it |
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Co-authored-by: Matt Mahoney <mahoney.mattj@gmail.com>
Co-authored-by: Benjie <benjie@jemjie.com>
Co-authored-by: Benjie <benjie@jemjie.com>
Co-authored-by: Benjie <benjie@jemjie.com>
Co-authored-by: Benjie <benjie@jemjie.com>
^ Trying to get EasyCLA to re-evaluate. |
This spec contains amendments to #1010, a diffed view is available at mjmahone#3.
These amendments are made from comments on the implementation PR and alterations from the new implementation
coerce
logic we use in the general flowIn general the biggest changes are that we introduce
fragmentVariableValues
which will be on thegroupedFieldSet
, 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.Last but not least we introduce
getArgumentValuesFromSpread
which looks at the spread and fragment-definition and establishes a coerced set of localVariableValues.