60 lines
1.3 KiB
Ruby
60 lines
1.3 KiB
Ruby
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# frozen_string_literal: true
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module Graphql
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# Helper to pass variables around generated queries.
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#
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# e.g.:
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# first = var('Int')
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# after = var('String')
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#
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# query = with_signature(
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# [first, after],
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# query_graphql_path([
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# [:project, { full_path: project.full_path }],
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# [:issues, { after: after, first: first }]
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# :nodes
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# ], all_graphql_fields_for('Issue'))
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# )
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#
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# post_graphql(query, variables: [first.with(2), after.with(some_cursor)])
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#
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class Var
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attr_reader :name, :type
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attr_accessor :value
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def initialize(name, type)
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@name = name
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@type = type
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end
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def sig
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"#{to_graphql_value}: #{type}"
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end
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def to_graphql_value
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"$#{name}"
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end
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# We return a new object so that running the same query twice with
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# different values does not risk re-using the value
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#
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# e.g.
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#
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# x = var('Int')
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# expect { post_graphql(query, variables: x) }
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# .to issue_same_number_of_queries_as { post_graphql(query, variables: x.with(1)) }
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#
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# Here we post the `x` variable once with the value set to 1, and once with
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# the value set to `nil`.
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def with(value)
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copy = Var.new(name, type)
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copy.value = value
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copy
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end
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def to_h
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{ name => value }
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end
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end
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end
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