Tab Betriebsmittel: change type of field Kaution to number, add validation if numeric

application/controllers/api/frontend/v1/betriebsmittel/BetriebsmittelP.php

@@ -158,6 +158,11 @@ class BetriebsmittelP extends FHCAPI_Controller
 		], [
 			'uid_in_person' => $this->p->t('person', 'error_uidNotInPerson')
 		]);
+
+		$this->form_validation->set_rules('kaution', 'Kaution', 'numeric', [
+			'numeric' => $this->p->t('ui', 'error_fieldNotNumeric', ['field' => 'Kaution'])
+		]);
+
 		$this->validateNewOrUpdate();
 
 		$betriebsmitteltyp = $this->input->post('betriebsmitteltyp');
@@ -241,6 +246,10 @@ class BetriebsmittelP extends FHCAPI_Controller
 
 	public function updateBetriebsmittel($betriebsmittelperson_id)
 	{
+		$this->form_validation->set_rules('kaution', 'Kaution', 'numeric', [
+			'numeric' => $this->p->t('ui', 'error_fieldNotNumeric', ['field' => 'Kaution'])
+		]);
+
 		$this->validateNewOrUpdate();
 
 		$betriebsmitteltyp = $this->input->post('betriebsmitteltyp');

public/js/components/Betriebsmittel/Betriebsmittel.js

@@ -292,6 +292,12 @@ export default {
 			this.formData.anmerkung = null;
 			this.formData.beschreibung = null;
 			this.statusNew = true;
+		},
+		//helper function: workaround to trigger validation if input is not a number
+		normalizeKaution() {
+			if (this.formData.kaution === null || this.formData.kaution === '') {
+				this.formData.kaution = 'xxx'
+			}
 		}
 	},
 	created() {
@@ -401,9 +407,10 @@ export default {
 				
 				<div class="row mb-3">
 					<form-input
-						type="text"
+						type="number"
 						:label="$p.t('infocenter/kaution')"
 						name="kaution"
+						@blur="normalizeKaution"
 						v-model="formData.kaution"
 						>
 					</form-input>