Source file src/github.com/vektah/gqlparser/validator/rules/unique_fragment_names.go

Documentation: github.com/vektah/gqlparser/validator/rules

     1  package validator
     2  
     3  import (
     4  	"github.com/vektah/gqlparser/ast"
     5  	. "github.com/vektah/gqlparser/validator"
     6  )
     7  
     8  func init() {
     9  	AddRule("UniqueFragmentNames", func(observers *Events, addError AddErrFunc) {
    10  		seenFragments := map[string]bool{}
    11  
    12  		observers.OnFragment(func(walker *Walker, fragment *ast.FragmentDefinition) {
    13  			if seenFragments[fragment.Name] {
    14  				addError(
    15  					Message(`There can be only one fragment named "%s".`, fragment.Name),
    16  					At(fragment.Position),
    17  				)
    18  			}
    19  			seenFragments[fragment.Name] = true
    20  		})
    21  	})
    22  }
    23  

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