FEAT: new PseudoDocumentsField

FIX: BasePseudoDocument 's getEmbeddedDocument

module/data/fields/pseudoDocumentsField.mjs

@@ -0,0 +1,22 @@
+import { BasePseudoDocument } from "../pseudo-documents/_types";
+export default class PseudoDocumentsField extends foundry.data.fields.TypedObjectField {
+    constructor(model, options = {}, context = {}) {
+        options.validateKey ||= ((key) => foundry.data.validators.isValidId(key));
+        if (!(model instanceof BasePseudoDocument)) throw new Error("The model must be a PseudoDocument");
+        const field = new foundry.data.fields.EmbeddedDataField(model);
+        super(field, options, context);
+    }
+
+    /** @inheritdoc */
+    static get _defaults() {
+        return Object.assign(super._defaults, {
+            max: Infinity
+        });
+    }
+
+    /** @override */
+    _validateType(value, options = {}) {
+        if (Object.keys(value).length > this.max) throw new Error(`cannot have more than ${this.max} elements`);
+        return super._validateType(value, options);
+    }
+}