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fix(gen): better typing for optional types in typescript client #1876

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fix(gen): better typing for optional types in typescript client #1876

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f6d5a2f
fix: handle optional fields with undefined and null in TypeScript
melkstam Apr 17, 2025
42cfa81
chore: update test cases
melkstam Apr 17, 2025
ef8d256
Remove extra blank line in struct definition
melkstam Apr 17, 2025
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12 changes: 6 additions & 6 deletions pkg/clientgen/testdata/goapp/expected_typescript.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -223,7 +223,7 @@ export namespace svc {
}

export interface Recursive {
Optional?: Recursive
Optional?: Recursive | undefined | null
Slice: Recursive[]
Map: { [key: string]: Recursive }
}
Expand All @@ -232,17 +232,17 @@ export namespace svc {
/**
* Foo is good
*/
Foo?: Foo
Foo?: Foo | undefined | null

/**
* Baz is better
*/
boo: string

QueryFoo?: boolean
QueryBar?: string
HeaderBaz?: string
HeaderInt?: number
QueryFoo?: boolean | undefined | null
QueryBar?: string | undefined | null
HeaderBaz?: string | undefined | null
HeaderInt?: number | undefined | null
/**
* This is a multiline
* comment on the raw message!
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24 changes: 12 additions & 12 deletions pkg/clientgen/testdata/tsapp/expected_typescript.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -69,42 +69,42 @@ export interface ClientOptions {

export namespace svc {
export interface AuthParams {
cookie?: string
token?: string
cookie?: string | undefined | null
token?: string | undefined | null
}

export interface Request {
/**
* Foo is good
*/
foo?: number
foo?: number | undefined | null

/**
* Baz is better
*/
baz: string

queryFoo?: boolean
queryBar?: string
headerBaz?: string
headerNum?: number
queryFoo?: boolean | undefined | null
queryBar?: string | undefined | null
headerBaz?: string | undefined | null
headerNum?: number | undefined | null
}

export interface Request {
/**
* Foo is good
*/
foo?: number
foo?: number | undefined | null

/**
* Baz is better
*/
baz: string

queryFoo?: boolean
queryBar?: string
headerBaz?: string
headerNum?: number
queryFoo?: boolean | undefined | null
queryBar?: string | undefined | null
headerBaz?: string | undefined | null
headerNum?: number | undefined | null
}

export class ServiceClient {
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6 changes: 5 additions & 1 deletion pkg/clientgen/typescript.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1744,11 +1744,15 @@ func (ts *typescript) writeTyp(ns string, typ *schema.Type, numIndents int) {
indent()
ts.WriteString(ts.QuoteIfRequired(ts.fieldNameInStruct(field)))

if field.Optional || ts.isRecursive(field.Typ) {
isOptional := field.Optional || ts.isRecursive(field.Typ)
if isOptional {
ts.WriteString("?")
}
ts.WriteString(": ")
ts.writeTyp(ns, field.Typ, numIndents+1)
if isOptional {
ts.WriteString(" | undefined | null")
}
ts.WriteString("\n")

// Add another empty line if we have a doc comment
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