From 625d2a2af198a82134db21daafa1ebda1b5cfbe2 Mon Sep 17 00:00:00 2001
From: Arthur Lefebvre <artlef@protonmail.com>
Date: Fri, 3 Apr 2026 22:57:45 +0200
Subject: [PATCH] Add a view to see all books in a collection

---
 demodata.sql                                 |  2 +-
 front/src/CollectionForm.vue                 | 51 ++++++++++++++++
 front/src/CollectionFormBookItem.vue         | 37 ++++++++++++
 front/src/CollectionListElement.vue          | 14 ++++-
 front/src/api.js                             |  5 ++
 front/src/locales/en.json                    |  5 +-
 front/src/locales/fr.json                    |  3 +
 front/src/router.js                          |  2 +
 internal/adapter/adapter.go                  | 26 +++++++--
 internal/apitest/fetchallcollections_test.go |  4 +-
 internal/apitest/get_book_test.go            | 21 +------
 internal/apitest/get_collection_test.go      | 34 +++++++++++
 internal/dto/out.go                          |  7 +++
 internal/i18nresource/locale.en.toml         |  4 +-
 internal/i18nresource/locale.fr.toml         |  4 +-
 internal/query/query.go                      | 27 ++++++---
 internal/routes/collectionget.go             | 61 ++++++++++++++++++++
 internal/routes/collectionsget.go            |  2 +-
 internal/setup/setup.go                      |  3 +
 internal/testutils/testutils.go              | 17 ++++++
 20 files changed, 285 insertions(+), 44 deletions(-)
 create mode 100644 front/src/CollectionForm.vue
 create mode 100644 front/src/CollectionFormBookItem.vue
 create mode 100644 internal/apitest/get_collection_test.go
 create mode 100644 internal/routes/collectionget.go

diff --git a/demodata.sql b/demodata.sql
index ac493ef..da6a9b1 100644
--- a/demodata.sql
+++ b/demodata.sql
@@ -129,7 +129,7 @@ INSERT INTO user_books(created_at, user_id, book_id, start_read_date, rating) VA
 -- collections
 INSERT INTO collections(name, user_id) VALUES ('Littérature française',(SELECT id FROM users WHERE name = 'demo'));
 INSERT INTO collections(name, user_id) VALUES ('Nouvelles',(SELECT id FROM users WHERE name = 'demo'));
-INSERT INTO collections(name, user_id) VALUES ('Non fiction',(SELECT id FROM users WHERE name = 'demo'));
+INSERT INTO collections(name, user_id) VALUES ('Non fiction',(SELECT id FROM users WHERE name = 'demo2'));
 
 INSERT INTO collection_books(collection_id, book_id) VALUES ((SELECT id FROM collections WHERE name = 'Littérature française'), (SELECT id FROM books WHERE title = 'Nord'));
 INSERT INTO collection_books(collection_id, book_id) VALUES ((SELECT id FROM collections WHERE name = 'Littérature française'), (SELECT id FROM books WHERE title = 'Gargantua'));
diff --git a/front/src/CollectionForm.vue b/front/src/CollectionForm.vue
new file mode 100644
index 0000000..7636d01
--- /dev/null
+++ b/front/src/CollectionForm.vue
@@ -0,0 +1,51 @@
+<script setup>
+import { computed, ref } from 'vue'
+import { getCollection } from './api.js'
+import CollectionFormBookItem from './CollectionFormBookItem.vue'
+import Pagination from './Pagination.vue'
+
+const props = defineProps({
+  id: String,
+})
+
+const limit = 5
+const pageNumber = ref(1)
+
+const offset = computed(() => (pageNumber.value - 1) * limit)
+
+const data = ref(null)
+const error = ref(null)
+
+let totalElementsNumber = computed(() =>
+  typeof data != 'undefined' && data.value != null ? data.value['count'] : 0,
+)
+
+let pageTotal = computed(() => Math.ceil(totalElementsNumber.value / limit))
+
+getCollection(data, error, props.id, limit, offset.value)
+
+function pageChange(newPageNumber) {
+  pageNumber.value = newPageNumber
+  data.value = null
+  getCollection(data, error, props.id, limit, offset.value)
+}
+</script>
+
+<template>
+  <div v-if="error">{{ $t('bookform.error', { error: error.message }) }}</div>
+  <div v-if="data">
+    <h2 class="title">{{ data.name }}</h2>
+    <div>
+      <CollectionFormBookItem v-for="book in data.books" :key="book.id" v-bind="book" />
+    </div>
+    <Pagination
+      class="mt-5"
+      :pageNumber="pageNumber"
+      :pageTotal="pageTotal"
+      maxItemDisplayed="11"
+      @pageChange="pageChange"
+    />
+  </div>
+</template>
+
+<style></style>
diff --git a/front/src/CollectionFormBookItem.vue b/front/src/CollectionFormBookItem.vue
new file mode 100644
index 0000000..57e9fca
--- /dev/null
+++ b/front/src/CollectionFormBookItem.vue
@@ -0,0 +1,37 @@
+<script setup>
+import { getImagePathOrDefault } from './api.js'
+import { computed } from 'vue'
+
+const props = defineProps({
+  title: String,
+  coverPath: String,
+})
+const imagePathOrDefault = computed(() => getImagePathOrDefault(props.coverPath))
+</script>
+
+<template>
+  <div class="bookcontainer has-background-dark p-2 m-2">
+    <img class="mr-2" v-bind:src="imagePathOrDefault" v-bind:alt="title" />
+    <h3 class="centered subtitle">{{ title }}</h3>
+  </div>
+</template>
+
+<style>
+img {
+  max-height: 200px;
+  max-width: 200px;
+  height: auto;
+  width: auto;
+}
+
+.bookcontainer {
+  display: flex;
+  transition: ease-in-out 0.04s;
+  border-radius: 20px;
+}
+
+.bookcontainer:hover {
+  transform: scale(1.01);
+  transition: ease-in-out 0.02s;
+}
+</style>
diff --git a/front/src/CollectionListElement.vue b/front/src/CollectionListElement.vue
index b513a14..1689024 100644
--- a/front/src/CollectionListElement.vue
+++ b/front/src/CollectionListElement.vue
@@ -1,26 +1,36 @@
 <script setup>
 import { getImagePathOrDefault } from './api.js'
+import { useRouter } from 'vue-router'
 
 const props = defineProps({
   id: Number,
   name: String,
   books: Array,
 })
+
+const router = useRouter()
+
+function goToCollection() {
+  const collectionId = props.id
+  router.push(`/collection/${props.id}`)
+}
 </script>
+
 <template>
-  <div class="collectioncontainer has-background-dark p-2">
+  <div class="collectioncontainer has-background-dark p-2" @click="goToCollection">
     <div class="collectionheader">
       <h2 class="subtitle">
         {{ props.name }}
       </h2>
     </div>
-    <div class="collectionpreviewbooks">
+    <div class="collectionpreviewbooks" v-if="props.books && props.books.length > 0">
       <div class="bookpreview mx-1" v-for="book in props.books" :key="book.id">
         <img v-bind:src="getImagePathOrDefault(book.coverPath)" v-bind:alt="book.title" />
       </div>
     </div>
   </div>
 </template>
+
 <style scoped>
 img {
   max-height: 100px;
diff --git a/front/src/api.js b/front/src/api.js
index 2419831..32c847d 100644
--- a/front/src/api.js
+++ b/front/src/api.js
@@ -60,6 +60,11 @@ export function getCollections(data, error, limit, offset) {
   return useFetch(data, error, '/ws/collections' + '?' + queryParams.toString())
 }
 
+export function getCollection(data, error, id, limit, offset) {
+  const queryParams = new URLSearchParams({ limit: limit, offset: offset })
+  return useFetch(data, error, '/ws/collection/' + id + '?' + queryParams.toString())
+}
+
 export function getMyBooks(data, error, arg, limit, offset) {
   const queryParams = new URLSearchParams({ limit: limit, offset: offset })
   return useFetch(data, error, '/ws/mybooks/' + arg + '?' + queryParams.toString())
diff --git a/front/src/locales/en.json b/front/src/locales/en.json
index e4d33a3..083a6c5 100644
--- a/front/src/locales/en.json
+++ b/front/src/locales/en.json
@@ -93,6 +93,9 @@
   "collections": {
     "error": "Error when loading collections: {error}",
     "add": "Add a collection",
-    "name": "Nom"
+    "name": "Name"
+  },
+  "collection": {
+    "error": "Error when loading collection: {error}"
   }
 }
diff --git a/front/src/locales/fr.json b/front/src/locales/fr.json
index 1e8c8a9..ca1d3ee 100644
--- a/front/src/locales/fr.json
+++ b/front/src/locales/fr.json
@@ -94,5 +94,8 @@
     "error": "Erreur pendant le chargement des listes: {error}",
     "add": "Ajouter une liste",
     "name": "Nom"
+  },
+  "collection": {
+    "error": "Erreur pendant le chargement de la liste : {error}"
   }
 }
diff --git a/front/src/router.js b/front/src/router.js
index 75a7644..2232966 100644
--- a/front/src/router.js
+++ b/front/src/router.js
@@ -2,6 +2,7 @@ import { createRouter, createWebHistory } from 'vue-router'
 
 import BooksBrowser from './BooksBrowser.vue'
 import CollectionsBrowser from './CollectionsBrowser.vue'
+import CollectionForm from './CollectionForm.vue'
 import BookFormEdit from './BookFormEdit.vue'
 import AuthorForm from './AuthorForm.vue'
 import BookFormView from './BookFormView.vue'
@@ -22,6 +23,7 @@ const routes = [
   { path: '/book/:id', component: BookFormView, props: true },
   { path: '/book/:id/edit', component: BookFormEdit, props: true },
   { path: '/collections', component: CollectionsBrowser },
+  { path: '/collection/:id', component: CollectionForm, props: true },
   { path: '/author/:id', component: AuthorForm, props: true },
   { path: '/search/:searchterm', component: SearchBook, props: true },
   { path: '/import/inventaire/:inventaireid', component: ImportInventaire, props: true },
diff --git a/internal/adapter/adapter.go b/internal/adapter/adapter.go
index 127380a..856e420 100644
--- a/internal/adapter/adapter.go
+++ b/internal/adapter/adapter.go
@@ -10,7 +10,17 @@ import (
 	"gorm.io/gorm"
 )
 
-func CollectionQueryToDto(collectionsQueryResult []query.CollectionsQueryResult) []dto.CollectionItemGet {
+func CollectionQueryToCollectionDto(collectionsQueryResult []query.CollectionsQueryResult) dto.CollectionGet {
+	var collection dto.CollectionGet
+	for _, collectionsDb := range collectionsQueryResult {
+		collection.Name = collectionsDb.Name
+		collection.Books = append(collection.Books, collectionDbToBookItem(&collectionsDb))
+		collection.UserID = collectionsDb.UserID
+	}
+	return collection
+}
+
+func CollectionQueryToCollectionItemDto(collectionsQueryResult []query.CollectionsQueryResult) []dto.CollectionItemGet {
 	var collections []dto.CollectionItemGet
 	for _, collectionDb := range collectionsQueryResult {
 		i := findIdInCollection(collections, collectionDb.ID)
@@ -22,15 +32,19 @@ func CollectionQueryToDto(collectionsQueryResult []query.CollectionsQueryResult)
 			//current collection is the last element
 			i = len(collections) - 1
 		}
-		collections[i].Books = append(collections[i].Books, dto.CollectionBookItemGet{
-			ID:        collectionDb.BookId,
-			Title:     collectionDb.BookTitle,
-			CoverPath: collectionDb.CoverPath,
-		})
+		collections[i].Books = append(collections[i].Books, collectionDbToBookItem(&collectionDb))
 	}
 	return collections
 }
 
+func collectionDbToBookItem(collectionDb *query.CollectionsQueryResult) dto.CollectionBookItemGet {
+	return dto.CollectionBookItemGet{
+		ID:        collectionDb.BookId,
+		Title:     collectionDb.BookTitle,
+		CoverPath: collectionDb.CoverPath,
+	}
+}
+
 // returns the position in collections, -1 if not found
 func findIdInCollection(collections []dto.CollectionItemGet, collectionId uint) int {
 	for i, collection := range collections {
diff --git a/internal/apitest/fetchallcollections_test.go b/internal/apitest/fetchallcollections_test.go
index d01fa93..bfc7693 100644
--- a/internal/apitest/fetchallcollections_test.go
+++ b/internal/apitest/fetchallcollections_test.go
@@ -12,8 +12,8 @@ import (
 func TestFetchAllCollections_OK(t *testing.T) {
 	status, res := testFetchCollections(t, "10", "0")
 	assert.Equal(t, http.StatusOK, status)
-	assert.Equal(t, int64(3), res.Count)
-	assert.Equal(t, 3, len(res.Collections))
+	assert.Equal(t, int64(2), res.Count)
+	assert.Equal(t, 2, len(res.Collections))
 }
 
 func testFetchCollections(t *testing.T, limit string, offset string) (int, dto.CollectionItemsGet) {
diff --git a/internal/apitest/get_book_test.go b/internal/apitest/get_book_test.go
index 3c8c5ab..2047a88 100644
--- a/internal/apitest/get_book_test.go
+++ b/internal/apitest/get_book_test.go
@@ -1,10 +1,7 @@
 package apitest
 
 import (
-	"encoding/json"
-	"fmt"
 	"net/http"
-	"net/http/httptest"
 	"testing"
 
 	"git.artlef.fr/bibliomane/internal/dto"
@@ -61,20 +58,8 @@ func TestGetBook_IdNotInt(t *testing.T) {
 	testGetBook(t, "wrong", http.StatusBadRequest)
 }
 
-func testGetBook(t *testing.T, id string, status int) dto.FullBookGet {
-	router := testutils.TestSetup()
-
-	token := testutils.ConnectDemoUser(router)
-	req, _ := http.NewRequest("GET", "/ws/book/"+id, nil)
-	req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", token))
-	w := httptest.NewRecorder()
-	router.ServeHTTP(w, req)
-
-	var book dto.FullBookGet
-	err := json.Unmarshal(w.Body.Bytes(), &book)
-	if err != nil {
-		t.Error(err)
-	}
-	assert.Equal(t, status, w.Code)
+func testGetBook(t *testing.T, id string, expectedStatus int) dto.FullBookGet {
+	status, book := testutils.TestFetchOneModel[dto.FullBookGet](t, "/ws/book", id)
+	assert.Equal(t, expectedStatus, status)
 	return book
 }
diff --git a/internal/apitest/get_collection_test.go b/internal/apitest/get_collection_test.go
new file mode 100644
index 0000000..a579b0c
--- /dev/null
+++ b/internal/apitest/get_collection_test.go
@@ -0,0 +1,34 @@
+package apitest
+
+import (
+	"net/http"
+	"testing"
+
+	"git.artlef.fr/bibliomane/internal/dto"
+	"git.artlef.fr/bibliomane/internal/testutils"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetCollection_Ok(t *testing.T) {
+	status, collection := testGetCollection(t, "1", "10", "0")
+	assert.Equal(t, http.StatusOK, status)
+	assert.Equal(t, "Littérature française", collection.Name)
+	assert.Equal(t, 6, len(collection.Books))
+}
+
+func TestGetCollection_Limit(t *testing.T) {
+	status, collection := testGetCollection(t, "2", "3", "0")
+	assert.Equal(t, http.StatusOK, status)
+	assert.Equal(t, "Nouvelles", collection.Name)
+	assert.Equal(t, 3, len(collection.Books))
+	assert.Equal(t, int64(4), collection.Count)
+}
+
+func TestGetCollection_Unauthorized(t *testing.T) {
+	status, _ := testGetCollection(t, "4", "10", "0")
+	assert.Equal(t, http.StatusUnauthorized, status)
+}
+
+func testGetCollection(t *testing.T, id string, limit string, offset string) (int, dto.CollectionGet) {
+	return testutils.TestFetchModel[dto.CollectionGet](t, "/ws/collection/"+id, limit, offset)
+}
diff --git a/internal/dto/out.go b/internal/dto/out.go
index 34cacf1..b58f89f 100644
--- a/internal/dto/out.go
+++ b/internal/dto/out.go
@@ -44,6 +44,13 @@ type BookItemGet struct {
 	CoverPath           string `json:"coverPath"`
 }
 
+type CollectionGet struct {
+	Name   string                  `json:"name"`
+	Count  int64                   `json:"count"`
+	Books  []CollectionBookItemGet `json:"books"`
+	UserID uint                    `json:"-"`
+}
+
 type CollectionItemsGet struct {
 	Count       int64               `json:"count"`
 	Collections []CollectionItemGet `json:"collections"`
diff --git a/internal/i18nresource/locale.en.toml b/internal/i18nresource/locale.en.toml
index 1cf03fd..0132d7a 100644
--- a/internal/i18nresource/locale.en.toml
+++ b/internal/i18nresource/locale.en.toml
@@ -9,6 +9,4 @@ ValidationPropertyFail = "Validation failed for '%s' property."
 RegistrationDisabled = "Registration has been disabled on this instance."
 UserAlreadyExists = "An user with this name already exists."
 ErrorWhenCreatingUserFromStr = "Error when creating user from string %s"
-ISBNNotFoundBabelio = "ISBN %s not found on babelio."
-BabelioParseError = "Error when parsing babelio."
-BabelioFetchDescError = "Error when fetching description on babelio."
+Unauthorized = "You are not allowed to access this document."
diff --git a/internal/i18nresource/locale.fr.toml b/internal/i18nresource/locale.fr.toml
index f75734c..c2be96d 100644
--- a/internal/i18nresource/locale.fr.toml
+++ b/internal/i18nresource/locale.fr.toml
@@ -9,6 +9,4 @@ ValidationPropertyFail = "La validation a échoué pour la propriété '%s'."
 RegistrationDisabled = "La création de nouveaux comptes a été désactivée sur cette instance."
 UserAlreadyExists = "Un utilisateur avec le même nom existe déjà."
 ErrorWhenCreatingUserFromStr = "Erreur lors de la création de l'utilisateur %s"
-ISBNNotFoundBabelio = "L'ISBN %s n'est pas sur babelio."
-BabelioParseError = "Erreur en parsant babelio."
-BabelioFetchDescError = "Erreur lors de la récupération de la description sur babelio."
+Unauthorized = "Vous n'êtes pas autorisé à accéder à cette page."
diff --git a/internal/query/query.go b/internal/query/query.go
index c154e75..19c8e0f 100644
--- a/internal/query/query.go
+++ b/internal/query/query.go
@@ -186,6 +186,7 @@ func selectBookItem() string {
 
 type CollectionsQueryResult struct {
 	ID        uint
+	UserID    uint
 	Name      string
 	BookId    uint
 	BookTitle string
@@ -204,7 +205,8 @@ func FetchAllCollections(db *gorm.DB, userId uint, limit int, offset int) ([]Col
 		return collections, res.Error
 	}
 	for _, collectionId := range collectionIds {
-		queryResults, err := queryBooksForCollection(db, collectionId.ID)
+		//only takes first 5 books
+		queryResults, err := FetchCollectionBooks(db, collectionId.ID, 5, 0)
 		if err != nil {
 			return collections, res.Error
 		}
@@ -213,18 +215,29 @@ func FetchAllCollections(db *gorm.DB, userId uint, limit int, offset int) ([]Col
 	return collections, res.Error
 }
 
-func queryBooksForCollection(db *gorm.DB, collectionId uint) ([]CollectionsQueryResult, error) {
+func FetchCollectionBooks(db *gorm.DB, collectionId uint, limit int, offset int) ([]CollectionsQueryResult, error) {
 	var collections []CollectionsQueryResult
+	query := fetchCollectionBooksQuery(db, collectionId)
+	query = query.Limit(limit)
+	query = query.Offset(offset)
+	res := query.Find(&collections)
+	return collections, res.Error
+}
+
+func FetchCollectionBooksCount(db *gorm.DB, collectionId uint) (int64, error) {
+	var count int64
+	res := fetchCollectionBooksQuery(db, collectionId).Count(&count)
+	return count, res.Error
+}
+
+func fetchCollectionBooksQuery(db *gorm.DB, collectionId uint) *gorm.DB {
 	query := db.Model(&model.Collection{})
-	query = query.Select("collections.id, collections.name, books.id as book_id, books.title as book_title, " + selectStaticFilesPath())
+	query = query.Select("collections.id, collections.user_id, collections.name, books.id as book_id, books.title as book_title, " + selectStaticFilesPath())
 	query = query.Joins("left join collection_books on (collection_books.collection_id = collections.id)")
 	query = query.Joins("left join books on (books.id = collection_books.book_id)")
 	query = joinStaticFiles(query)
 	query = query.Where("collections.id = ?", collectionId)
-	//only takes first 5 books
-	query = query.Limit(5)
-	res := query.Find(&collections)
-	return collections, res.Error
+	return query
 }
 
 func FetchAllCollectionsCount(db *gorm.DB, userId uint) (int64, error) {
diff --git a/internal/routes/collectionget.go b/internal/routes/collectionget.go
new file mode 100644
index 0000000..64ea0ab
--- /dev/null
+++ b/internal/routes/collectionget.go
@@ -0,0 +1,61 @@
+package routes
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+
+	"git.artlef.fr/bibliomane/internal/adapter"
+	"git.artlef.fr/bibliomane/internal/appcontext"
+	"git.artlef.fr/bibliomane/internal/i18nresource"
+	"git.artlef.fr/bibliomane/internal/myvalidator"
+	"git.artlef.fr/bibliomane/internal/query"
+	"github.com/gin-gonic/gin"
+)
+
+func GetCollectionHandler(ac appcontext.AppContext) {
+	collectionId, err := strconv.ParseUint(ac.C.Param("id"), 10, 64)
+	if err != nil {
+		ac.C.JSON(http.StatusBadRequest, gin.H{"error": err})
+		return
+	}
+
+	user, err := ac.GetAuthenticatedUser()
+	if err != nil {
+		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+		return
+	}
+
+	limit, err := ac.GetQueryLimit()
+	if err != nil {
+		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+		return
+	}
+	offset, err := ac.GetQueryOffset()
+	if err != nil {
+		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+		return
+	}
+	collectionBooksDb, err := query.FetchCollectionBooks(ac.Db, uint(collectionId), limit, offset)
+	if err != nil {
+		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+		return
+	}
+	collection := adapter.CollectionQueryToCollectionDto(collectionBooksDb)
+	count, err := query.FetchCollectionBooksCount(ac.Db, uint(collectionId))
+	if err != nil {
+		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+		return
+	}
+	collection.Count = count
+	if collection.UserID != user.ID {
+		err := myvalidator.HttpError{
+			StatusCode: http.StatusUnauthorized,
+			Err:        errors.New(i18nresource.GetTranslatedMessage(&ac, "Unauthorized")),
+		}
+		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+		return
+	} else {
+		ac.C.JSON(http.StatusOK, collection)
+	}
+}
diff --git a/internal/routes/collectionsget.go b/internal/routes/collectionsget.go
index fb9c083..9ba36fd 100644
--- a/internal/routes/collectionsget.go
+++ b/internal/routes/collectionsget.go
@@ -31,7 +31,7 @@ func GetCollectionsHandler(ac appcontext.AppContext) {
 		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
 		return
 	}
-	collections := adapter.CollectionQueryToDto(collectionsDb)
+	collections := adapter.CollectionQueryToCollectionItemDto(collectionsDb)
 	count, err := query.FetchAllCollectionsCount(ac.Db, user.ID)
 	if err != nil {
 		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
diff --git a/internal/setup/setup.go b/internal/setup/setup.go
index d1413cc..a63c7b0 100644
--- a/internal/setup/setup.go
+++ b/internal/setup/setup.go
@@ -81,6 +81,9 @@ func Setup(config *config.Config) *gin.Engine {
 	ws.GET("/collections", func(c *gin.Context) {
 		routes.GetCollectionsHandler(appcontext.AppContext{C: c, Db: db, I18n: bundle, Config: config})
 	})
+	ws.GET("/collection/:id", func(c *gin.Context) {
+		routes.GetCollectionHandler(appcontext.AppContext{C: c, Db: db, I18n: bundle, Config: config})
+	})
 	ws.POST("/collection", func(c *gin.Context) {
 		routes.PostCollectionHandler(appcontext.AppContext{C: c, Db: db, I18n: bundle, Config: config})
 	})
diff --git a/internal/testutils/testutils.go b/internal/testutils/testutils.go
index 1f0ad4a..850da81 100644
--- a/internal/testutils/testutils.go
+++ b/internal/testutils/testutils.go
@@ -68,6 +68,23 @@ func TestBookPutCallWithDemoPayload(t *testing.T, payload string, bookId string,
 	}
 }
 
+func TestFetchOneModel[T any](t *testing.T, urlpath string, id string) (int, T) {
+	router := TestSetup()
+
+	token := ConnectDemoUser(router)
+	req, _ := http.NewRequest("GET", urlpath+"/"+id, nil)
+	req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", token))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	var result T
+	err := json.Unmarshal(w.Body.Bytes(), &result)
+	if err != nil {
+		t.Error(err)
+	}
+	return w.Code, result
+}
+
 func TestFetchModel[T any](t *testing.T, urlpath string, limit string, offset string) (int, T) {
 	router := TestSetup()