src/components/CreateNewPostcodeForm.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { reactive, ref } from 'vue';
+import { reactive, ref, watch } from 'vue';
 import { useI18n } from 'vue-i18n';
 
 import FetchData from 'components/FetchData.vue';
@@ -22,9 +22,11 @@ const postcodeFormData = reactive({
     townFk: null,
 });
 
+const townsFetchDataRef = ref(null);
 const provincesFetchDataRef = ref(null);
 const countriesOptions = ref([]);
 const provincesOptions = ref([]);
+const townsOptions = ref([]);
 const town = ref({});
 
 function onDataSaved(formData) {
@@ -67,20 +69,63 @@ async function setProvince(id, data) {
 
     data.countryFk = newProvince.countryFk;
 }
+
+// Watchers to update filters based on country and province changes
+watch(
+    () => [postcodeFormData.countryFk],
+    async (newCountryFk) => {
+        if (newCountryFk) {
+            await provincesFetchDataRef.value.fetch({
+                where: {
+                    countryFk: newCountryFk[0],
+                },
+            });
+            await townsFetchDataRef.value.fetch({
+                where: {
+                    provinceFk: {
+                        inq: provincesOptions.value.map(({ id }) => id),
+                    },
+                },
+            });
+        }
+    }
+);
+
+watch(
+    () => postcodeFormData.provinceFk,
+    async (newProvinceFk) => {
+        if (newProvinceFk) {
+            await townsFetchDataRef.value.fetch({
+                where: { provinceFk: newProvinceFk[0] },
+            });
+        }
+    }
+);
+async function handleProvinces(data) {
+    provincesOptions.value = data;
+}
+async function handleTowns(data) {
+    townsOptions.value = data;
+}
+async function handleCountries(data) {
+    countriesOptions.value = data;
+}
 </script>
 
 <template>
     <FetchData
         ref="provincesFetchDataRef"
-        @on-fetch="(data) => (provincesOptions = data)"
+        @on-fetch="handleProvinces"
         auto-load
         url="Provinces/location"
     />
     <FetchData
-        @on-fetch="(data) => (countriesOptions = data)"
+        ref="townsFetchDataRef"
+        @on-fetch="handleTowns"
         auto-load
-        url="Countries"
+        url="Towns/location"
     />
+    <FetchData @on-fetch="handleCountries" auto-load url="Countries" />
     <FormModelPopup
         url-create="postcodes"
         model="postcode"
@@ -99,9 +144,9 @@ async function setProvince(id, data) {
                 />
                 <VnSelectDialog
                     :label="t('City')"
-                    url="Towns/location"
                     @update:model-value="(value) => setTown(value, data)"
                     v-model="data.townFk"
+                    :options="townsOptions"
                     option-label="name"
                     option-value="id"
                     :rules="validate('postcode.city')"
@@ -132,6 +177,7 @@ async function setProvince(id, data) {
             </VnRow>
             <VnRow>
                 <VnSelectProvince
+                    :country-fk="postcodeFormData.countryFk"
                     @update:model-value="(value) => setProvince(value, data)"
                     v-model="data.provinceFk"
                 />

src/components/VnSelectProvince.vue

@@ -10,7 +10,13 @@ import CreateNewProvinceForm from './CreateNewProvinceForm.vue';
 const emit = defineEmits(['onProvinceCreated']);
 const provinceFk = defineModel({ type: Number });
 watch(provinceFk, async () => await provincesFetchDataRef.value.fetch());
-
+const $props = defineProps({
+    countryFk: {
+        type: Number,
+        required: false,
+        default: null,
+    },
+});
 const { validate } = useValidator();
 const { t } = useI18n();
 
@@ -18,17 +24,31 @@ const provincesOptions = ref();
 const provincesFetchDataRef = ref();
 
 async function onProvinceCreated(_, data) {
-    await provincesFetchDataRef.value.fetch();
+    await provincesFetchDataRef.value.fetch({ where: { countryFk: $props.countryFk } });
     provinceFk.value = data.id;
     emit('onProvinceCreated', data);
 }
+watch(
+    () => $props.countryFk,
+    async (newProvinceFk) => {
+        if (newProvinceFk) {
+            // Assuming there's a townsFetchDataRef similar to provincesFetchDataRef
+            await provincesFetchDataRef.value.fetch({
+                where: { countryFk: newProvinceFk },
+            });
+        }
+    }
+);
+async function handleProvinces(data) {
+    provincesOptions.value = data;
+}
 </script>
 
 <template>
     <FetchData
         ref="provincesFetchDataRef"
         :filter="{ include: { relation: 'country' } }"
-        @on-fetch="(data) => (provincesOptions = data)"
+        @on-fetch="handleProvinces"
         auto-load
         url="Provinces"
     />