document.replace()
Replace all document fields.
Description
The replace() method replaces all fields with object, except
for the immutable metadata fields id, coll, and ts. Fields not
present in object, except immutable metadata fields, are removed
from the document.
Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
object |
Yes |
Object with the replacement document fields. |
Examples
Basic
Given the following document:
{
id: "777",
coll: Product,
ts: Time("2099-04-10T16:50:12.850Z"),
name: "limes",
description: "Conventional, 16 oz bag",
price: 2_99,
stock: 30,
category: Category("789")
}Call replace() with a replacement document object:
Product.byId("777")?.replace({
name: "limes",
description: "2 ct",
price: 99,
stock: 50,
category: Category.byId("789")
}){
id: "777",
coll: Product,
ts: Time("2099-04-10T17:54:37.670Z"),
name: "limes",
description: "2 ct",
price: 99,
stock: 50,
category: Category("789")
}Default values
A field definition can set a default field value for documents in a collection:
collection Customer {
// `name` accepts `String` and `Null` values.
// If missing, defaults to `unknown`.
name: String? = "unknown"
email: String
}If you don’t provide a value during document replacement, the document uses the default value:
// Replaces a `Customer` document.
Customer.byId("111")?.replace({
// The `name` field is missing.
email: "john.doe@example.com"
}){
id: "111",
coll: Customer,
ts: Time("2099-02-19T14:53:53.940Z"),
cart: Order("413002506150347264"),
orders: "hdW...",
email: "john.doe@example.com",
// `name` defaulted to `unknown`.
name: "unknown"
}If you provide an explicit null value, the field is null. Fields with null
values aren’t stored or returned.
Customer.byId("111")?.replace({
// `name` is an explicit `null`.
name: null,
email: "jane.doe@example.com"
}){
id: "111",
coll: Customer,
ts: Time("2099-02-19T14:53:53.940Z"),
cart: Order("413002506150347264"),
orders: "hdW...",
// `name` is not stored or returned.
email: "jane.doe@example.com"
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