functionDef.update()
Learn: User-defined functions (UDFs) |
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We recommend you use FSL to create and update user-defined functions (UDFs). See FSL function schema. |
Update function fields.
Description
The update()
method updates the Function definition with
the given object values. The object must have valid field names.
Staged schema
If a database has staged schema, this method interacts with the database’s staged schema, not the active schema.
You can’t rename a function while a database has staged schema.
If the database has no staged schema, using this method is equivalent to making an unstaged schema change. Changes are applied immediately to the database’s active schema.
Avoid concurrent schema changes
Concurrent unstaged schema changes can cause contended transactions, even if the changes affect different resources. This includes unstaged changes made using:
A schema change triggers a transaction that validates the entire database schema. To avoid errors, do one of the following instead:
-
Perform unstaged schema changes sequentially
Examples
Function.byName("validateOrderStatusTransition")?.update({
name: "validateOrderStatusTransition",
body: <<-END
(oldStatus, newStatus) => {
if (oldStatus == "cart" && newStatus != "processing") {
abort("Invalid status transition.")
} else if (oldStatus == "processing" && newStatus != "shipped") {
abort("Invalid status transition.")
} else if (oldStatus == "shipped" && newStatus != "delivered") {
abort("Invalid status transition.")
}
}
END,
role: "server"
})
{
name: "validateOrderStatusTransition",
coll: Function,
ts: Time("2099-10-25T18:16:27.725Z"),
body: <<-END
(oldStatus, newStatus) => {
if (oldStatus == "cart" && newStatus != "processing") {
abort("Invalid status transition.")
} else if (oldStatus == "processing" && newStatus != "shipped") {
abort("Invalid status transition.")
} else if (oldStatus == "shipped" && newStatus != "delivered") {
abort("Invalid status transition.")
}
}
END,
role: "server"
}
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