Is there a more efficient way to define a Zod schema with nullable properties without repeating the nullable() method for each property? Currently, I have defined it as shown below:
const MyObjectSchema = z
.object({
p1: z.string().nullable(),
p2: z.number().nullable(),
p3: z.boolean().nullable(),
p4: z.date().nullable(),
p5: z.symbol().nullable(),
})
.partial();
Note: Using .Partial does not make object fields nullable.
Below is a handy function you can use to make all fields of the zod object nullable while preserving field types.
function makeFieldsNullable<TSchema extends z.AnyZodObject>(schema: TSchema) {
const entries = Object.entries(schema.shape) as [keyof TSchema['shape'], z.ZodTypeAny][];
const updatedFields = entries.reduce((acc, [key, value]) => {
acc[key] = value.nullable();
return acc;
}, {} as {
[key in keyof TSchema['shape']]: z.ZodNullable<TSchema['shape'][key]>
});
return z.object(updatedFields)
}
Example of how to use this function:
makeFieldsNullable(
z.object({
field1: z.string(),
field2: z.number()
}),
)
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