Add code to school class, add form and mutation to join class

client/src/graphql/gql/mutations/joinClass.gql

@@ -0,0 +1,5 @@
+mutation JoinClass($input: JoinClassInput!) {
+  joinClass(input: $input) {
+    success
+  }
+}

client/src/pages/joinClass.vue

@@ -1,9 +1,52 @@
 <template>
   <div>
-    <h1>Join Class</h1>
+    <h1>Schulklasse beitreten {{code}}</h1>
     <div>
-      <input data-cy="input-class-code">
-      <a data-cy="join-class">Beitreten</a>
+      <div v-if="error">
+        {{error}}
+      </div>
+      <input
+        class="skillbox-input"
+        data-cy="input-class-code"
+        :value="code"
+        @input="updateCode">
+
+      <div>
+        <a class="button" data-cy="join-class" @click="joinClass(code)">Beitreten</a>
+      </div>
+
     </div>
   </div>
 </template>
+
+<script>
+  import JOIN_CLASS_MUTATION from '@/graphql/gql/mutations/joinClass.gql';
+
+  export default {
+    data: () => ({
+      code: '',
+      error: ''
+    }),
+
+    methods: {
+      updateCode(event) {
+        this.code = event.target.value;
+        this.error = '';
+      },
+      joinClass(code) {
+        this.$apollo.mutate({
+          mutation: JOIN_CLASS_MUTATION,
+          variables: {
+            input: {
+              code
+            }
+          }
+        }).catch(e => {
+          console.debug(e);
+          console.error(e.message)
+          this.error = 'Code ist nicht gültig';
+        })
+      }
+    }
+  }
+</script>

server/users/admin.py

@@ -15,7 +15,7 @@ class RoleInline(admin.TabularInline):
 
 @admin.register(SchoolClass)
 class SchoolClassAdmin(admin.ModelAdmin):
-    list_display = ('id', 'name')
+    list_display = ('name', 'code', 'is_deleted')
 
 
 @admin.register(Role)

server/users/migrations/0010_schoolclass_code.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.1.15 on 2020-02-11 10:14
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0009_auto_20191009_0905'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='schoolclass',
+            name='code',
+            field=models.CharField(blank=True, default=None, max_length=10, null=True, unique=True, verbose_name='Code zum Beitreten'),
+        ),
+    ]

server/users/models.py

@@ -70,9 +70,14 @@ class SchoolClass(models.Model):
     name = models.CharField(max_length=100, blank=False, null=False, unique=True)
     is_deleted = models.BooleanField(blank=False, null=False, default=False)
     users = models.ManyToManyField(get_user_model(), related_name='school_classes', blank=True)
+    code = models.CharField('Code zum Beitreten', blank=True, null=True, max_length=10, unique=True, default=None)
+
+    class Meta:
+        verbose_name = 'Schulklasse'
+        verbose_name_plural = 'Schulklassen'
 
     def __str__(self):
-        return 'SchoolClass {}-{}'.format(self.id, self.name)
+        return '{}'.format(self.name)
 
     @classmethod
     def generate_default_group_name(cls):
@@ -99,6 +104,11 @@ class SchoolClass(models.Model):
     def get_teacher(self):
         return self.users.filter(user_roles__role__key='teacher').first()
 
+    def save(self, *args, **kwargs):
+        if self.code == '':  # '' can't be unique, so we null it
+            self.code = None
+        super().save(*args, **kwargs)
+
 
 class Role(models.Model):
     key = models.CharField(_('Key'), max_length=100, blank=False, null=False, unique=True)
@@ -165,4 +175,3 @@ class UserRole(models.Model):
 class UserSetting(models.Model):
     user = models.OneToOneField(get_user_model(), on_delete=models.CASCADE, related_name='user_setting')
     selected_class = models.ForeignKey(SchoolClass, blank=True, null=True, on_delete=models.CASCADE)
-

server/users/mutations.py

@@ -9,6 +9,10 @@ from users.models import SchoolClass, UserSetting
 from users.serializers import PasswordSerialzer, AvatarUrlSerializer
 
 
+class CodeNotFoundException(Exception):
+    pass
+
+
 class FieldError(graphene.ObjectType):
     code = graphene.String()
 
@@ -102,8 +106,28 @@ class UpdateSetting(relay.ClientIDMutation):
     errors = graphene.List(UpdateError)
 
 
+class JoinClass(relay.ClientIDMutation):
+    class Input:
+        code = graphene.String(required=True)
+
+    success = graphene.Boolean()
+
+    @classmethod
+    def mutate_and_get_payload(cls, root, info, **kwargs):
+        user = info.context.user
+        code = kwargs.get('code')
+        try:
+            school_class = SchoolClass.objects.get(code__iexact=code)
+
+            school_class.users.add(user)
+
+            return cls(success=True)
+        except SchoolClass.DoesNotExist:
+            raise CodeNotFoundException('Code ist nicht gültig')
+
+
 class ProfileMutations:
     update_password = UpdatePassword.Field()
     update_avatar = UpdateAvatar.Field()
     update_setting = UpdateSetting.Field()
-
+    join_class = JoinClass.Field()