Jadpo is experimental and not ready for production. These docs follow the compiler's main branch as of 5 Nov 2026. What's built · Install 0.3.0

ReferenceErrors

Errors Reads and writes · rule

`data.patch_not_input`

Patch given something other than an Input.

Area 6, Reads and writes; not declinable; the next step is usually the agent's.

example

type ItemName = Text {    max_length: 80}entity Item {    id: Uuid    name: ItemName}action copy_name(item: Item, from: Item) -> Item {    return Item.update(item) {        patch: from    }}

jadpo checkcheck failed: 1 error, 1 file

error patch: takes an Input, and this is Item

--> main.jadpo:12:16

   |12 |         patch: from   |                ^^^^ this is `Item`

reason: A patch changes only the fields a request supplied, so it takes an Input whose fields are optional and named after Item's: one left out keeps its value, and one sent as none is cleared.
next: Pass an Input such as type PatchItem = Input { pick: [...] optional: all } (agent)
rule: data.patch_not_input
help: https://jadpo.dev/docs/errors/data.patch_not_input

Markdown for agents: /docs/errors/data.patch_not_input.md.Built from Jadpo main at aee2e8f.