myb-p-multi-select-fieldlisted

# Multi-Select Field (Simbla name-pattern convention) Create a field that: - Stores an **array of pointer objectIds** in the database (Parse `Array` type) - Renders on the form as a **Select2 multi-pick dropdown** populated from a lookup table - Works **without any custom JavaScript** — Simbla's runtime recognizes the field name and configures the rendering ## The core idea — name as metadata Simbla's form runtime parses the field name to decide how to render it. The pattern is: ``` array_<purpose>_Pointer_<TargetTable> ``` Each part has meaning: | Segment | Meaning | |---------|---------| | `array_` | Prefix → the field is a multi-pick array, render with `multiple="multiple"` | | `<purpose>` | Free-form snake_case (e.g., `sector`, `interests`, `tags`). Just for human readability — runtime ignores it. | | `_Pointer_` | Separator → the array elements are Parse pointers (objectIds), not raw values | | `<TargetTable>` | **Exact** class name of the lookup table (case-sensitive). Runtime sets `targetclass="<TargetTable>"` on the `<select>` and fetches options from there. | **Why this works**: When Simbla renders the form, it looks at each form-control's `name`. If the name matches `^array_.+_Pointer_(.+)$`, it knows to: 1. Make it `<select multiple>` 2. Set `targetclass` to the captured table name 3. Wire up Select2 with `data-criteria=containedIn` 4. Save selected values as a Parse `Array` of pointer objectIds No other approach (renaming, post-load JS injection, plain `Ar