🐛 Fixed Hidden error in "Add tier" modal (#15361)

closes https://github.com/TryGhost/Ghost/issues/15290

- Capture error from model errors
- Add hasValidated for name property to properly mark field as error/success
- Add property to hasValidated after each failed validation
- Wrap saving on try-catch to suppress uncaught exception (validation error)

ghost/admin/app/components/modal-tier.hbs

@@ -14,7 +14,7 @@
                 <h4 class="gh-main-section-header small bn">Basic</h4>
                 <div class="gh-main-section-content grey gh-tier-priceform-block">
                     {{#unless this.isFreeTier}}
-                        <GhFormGroup @errors={{this.errors}} @property="name" data-test-formgroup="name">
+                        <GhFormGroup @errors={{this.tier.errors}} @hasValidated={{this.tier.hasValidated}} @property="name" data-test-formgroup="name">
                             <label for="name" class="fw6">Name</label>
                             <GhTextInput
                                 @value={{readonly this.tier.name}}
@@ -25,11 +25,11 @@
                                 @id="name"
                                 @class="gh-input"
                                 data-test-input="tier-name" />
-                            <GhErrorMessage @errors={{this.errors}} @property="name" />
+                            <GhErrorMessage @errors={{this.tier.errors}} @property="name" />
                         </GhFormGroup>
                     {{/unless}}
 
-                    <GhFormGroup @errors={{this.errors}} @property="description" data-test-formgroup="description">
+                    <GhFormGroup @errors={{this.tier.errors}} @property="description" data-test-formgroup="description">
                         <label for="description" class="fw6">Description</label>
                         {{#if this.isFreeTier}}
                             <GhTextInput
@@ -50,7 +50,7 @@
                                 @class="gh-input"
                                 data-test-input="tier-description" />
                         {{/if}}
-                        <GhErrorMessage @errors={{this.errors}} @property="description" />
+                        <GhErrorMessage @errors={{this.tier.errors}} @property="description" />
                     </GhFormGroup>
 
                     {{#unless this.isFreeTier}}
@@ -107,7 +107,7 @@
                                 {{/if}}
                             </GhFormGroup>
                             
-                            <GhFormGroup @errors={{this.errors}} @property="trialDays" data-test-formgroup="trialDays">
+                            <GhFormGroup @errors={{this.tier.errors}} @property="trialDays" data-test-formgroup="trialDays">
                                 <div class="flex justify-between items-center mb2">
                                     <div>
                                         <h4 class="gh-tier-setting-title">Add a free trial</h4>

ghost/admin/app/components/modal-tier.js

@@ -1,11 +1,10 @@
-import EmberObject, {action} from '@ember/object';
 import ModalBase from 'ghost-admin/components/modal-base';
 import TierBenefitItem from '../models/tier-benefit-item';
 import classic from 'ember-classic-decorator';
+import {action} from '@ember/object';
 import {currencies, getCurrencyOptions, getSymbol} from 'ghost-admin/utils/currency';
 import {A as emberA} from '@ember/array';
 import {htmlSafe} from '@ember/template';
-import {isEmpty} from '@ember/utils';
 import {inject as service} from '@ember/service';
 import {task} from 'ember-concurrency';
 import {tracked} from '@glimmer/tracking';
@@ -30,7 +29,6 @@ export default class ModalTierPrice extends ModalBase {
     @tracked stripeMonthlyAmount = 5;
     @tracked stripeYearlyAmount = 50;
     @tracked currency = 'usd';
-    @tracked errors = EmberObject.create();
     @tracked stripePlanError = '';
     @tracked benefits = emberA([]);
     @tracked newBenefit = null;
@@ -159,9 +157,7 @@ export default class ModalTierPrice extends ModalBase {
     @task({drop: true})
     *saveTier() {
         this.validatePrices();
-        if (!isEmpty(this.errors) && Object.keys(this.errors).length > 0) {
-            return;
-        }
+
         if (this.stripePlanError || this.hasTrialDaysError) {
             return;
         }
@@ -183,10 +179,20 @@ export default class ModalTierPrice extends ModalBase {
         }
 
         this.tier.set('benefits', this.benefits.filter(benefit => !benefit.get('isBlank')));
+        
+        try {
             yield this.tier.save();
             this.hasSaved = true;
             yield this.confirm();
             this.send('closeModal');
+        } catch (error) {
+            if (error === undefined) {
+                // Validation error
+                return;
+            }
+
+            throw error;
+        }
     }
 
     validatePrices() {

ghost/admin/app/validators/tier.js

@@ -7,10 +7,12 @@ export default BaseValidator.create({
     name(model) {
         if (!model.name) {
             model.errors.add('name', 'Please enter Name.');
+            model.hasValidated.addObject('name');
             this.invalidate();
         }
         if (!validator.isLength(model.name || '', 0, 191)) {
             model.errors.add('name', 'Name cannot be longer than 191 characters.');
+            model.hasValidated.addObject('name');
             this.invalidate();
         }
     }