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safe_type_change.rb
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safe_type_change.rb
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module GraphQL
module SchemaComparator
module Changes
module SafeTypeChange
def safe_change_for_field?(old_type, new_type)
if !old_type.kind.wraps? && !new_type.kind.wraps?
old_type == new_type
elsif new_type.kind.non_null?
of_type = old_type.kind.non_null? ? old_type.of_type : old_type
safe_change_for_field?(of_type, new_type.of_type)
elsif old_type.kind.list?
new_type.kind.list? && safe_change_for_field?(old_type.of_type, new_type.of_type) ||
new_type.kind.non_null? && safe_change_for_field?(old_type, new_type.of_type)
else
false
end
end
def safe_change_for_input_value?(old_type, new_type)
if !old_type.kind.wraps? && !new_type.kind.wraps?
old_type == new_type
elsif old_type.kind.list? && new_type.kind.list?
safe_change_for_input_value?(old_type.of_type, new_type.of_type)
elsif old_type.kind.non_null?
of_type = new_type.kind.non_null? ? new_type.of_type : new_type
safe_change_for_input_value?(old_type.of_type, of_type)
else
false
end
end
end
end
end
end