Acknowledge year limitation of sample dataset

Author: cbullinger

mflix/README-JAVA-SPRING.md

@@ -14,12 +14,16 @@ This is a full-stack movie browsing application built with Java Spring Boot and
     └── mvnw
 ```
 
+## Data Limitations
+
+The `sample_mflix` dataset contains movies released up to **2015**. Searching for movies from 2016 or later will return no results. This is a limitation of the sample dataset, not the application.
+
 ## Prerequisites
 
 - **Java 21** or higher
 - **Node.js 20** or higher
 - **MongoDB Atlas cluster or local deployment** with the `sample_mflix` dataset loaded
-  - [Load sample data](https://www.mongodb.com/docs/atlas/sample-data/) 
+  - [Load sample data](https://www.mongodb.com/docs/atlas/sample-data/)
 - **Maven** (included via Maven Wrapper)
 - **Voyage AI API key** (For MongoDB Vector Search)
   - [Get a Voyage AI API key](https://www.voyageai.com/)

mflix/README-JAVASCRIPT-EXPRESS.md

@@ -14,6 +14,10 @@ This is a full-stack movie browsing application built with Express.js and Next.j
     └── tsconfig.json
 ```
 
+## Data Limitations
+
+The `sample_mflix` dataset contains movies released up to **2015**. Searching for movies from 2016 or later will return no results. This is a limitation of the sample dataset, not the application.
+
 ## Prerequisites
 
 - **Node.js 22** or higher

mflix/README-PYTHON-FASTAPI.md

@@ -17,6 +17,10 @@ This is a full-stack movie browsing application built with Python FastAPI and Ne
     └── requirements.txt
 ```
 
+## Data Limitations
+
+The `sample_mflix` dataset contains movies released up to **2015**. Searching for movies from 2016 or later will return no results. This is a limitation of the sample dataset, not the application.
+
 ## Prerequisites
 
 - **Python 3.10** to **Python 3.13**

mflix/client/app/components/FilterBar/FilterBar.module.css

@@ -93,6 +93,21 @@
   box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.15);
 }
 
+.inputWarning {
+  border-color: #f59e0b;
+}
+
+.inputWarning:focus {
+  border-color: #f59e0b;
+  box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.15);
+}
+
+.yearWarning {
+  font-size: 0.7rem;
+  color: #b45309;
+  margin-top: 0.25rem;
+}
+
 .ratingGroup {
   display: flex;
   align-items: center;

mflix/client/app/components/FilterBar/FilterBar.tsx

@@ -10,6 +10,9 @@ const SORT_OPTIONS = [
   { value: 'imdb.rating', label: 'IMDB Rating' },
 ];
 
+// The sample_mflix dataset only contains movies up to 2015
+const MAX_DATASET_YEAR = 2015;
+
 interface FilterBarProps {
   onFilterChange: (filters: MovieFilterParams) => void;
   isLoading?: boolean;
@@ -137,14 +140,19 @@ export default function FilterBar({
           <label className={styles.filterLabel}>Year</label>
           <input
             type="number"
-            className={styles.filterInput}
-            placeholder="e.g. 2020"
+            className={`${styles.filterInput} ${filters.year && filters.year > MAX_DATASET_YEAR ? styles.inputWarning : ''}`}
+            placeholder="e.g. 2010"
             value={filters.year || ''}
             onChange={(e) => handleFilterChange('year', e.target.value ? parseInt(e.target.value) : undefined)}
             disabled={isLoading}
             min={1900}
             max={2030}
           />
+          {filters.year && filters.year > MAX_DATASET_YEAR && (
+            <span className={styles.yearWarning}>
+              Dataset only contains movies up to {MAX_DATASET_YEAR}
+            </span>
+          )}
         </div>
 
         <div className={styles.filterGroup}>

mflix/client/app/components/MovieCard/MovieCard.tsx

@@ -14,6 +14,15 @@ import React from "react";
  * such as image error handling and selection checkbox.
  */
 
+/**
+ * Validates that a poster URL is valid for Next.js Image component.
+ * Must be an absolute URL (http/https) or a relative path starting with /
+ */
+const isValidPosterUrl = (url: string | undefined): boolean => {
+  if (!url || typeof url !== 'string') return false;
+  return url.startsWith('http://') || url.startsWith('https://') || url.startsWith('/');
+};
+
 interface MovieCardProps {
   movie: Movie;
   isSelected?: boolean;
@@ -48,9 +57,9 @@ export default function MovieCard({ movie, isSelected = false, onSelectionChange
       )}
 
       <div className={movieStyles.moviePoster}>
-        {movie.poster ? (
+        {isValidPosterUrl(movie.poster) ? (
           <Image
-            src={movie.poster}
+            src={movie.poster!}
             alt={`${movie.title} poster`}
             fill
             sizes="(max-width: 480px) 100vw, (max-width: 768px) 50vw, 280px"

mflix/client/app/movie/[id]/page.tsx

@@ -11,6 +11,15 @@ import { Movie } from '@/types/movie';
 import { ROUTES } from '@/lib/constants';
 import pageStyles from './page.module.css';
 
+/**
+ * Validates that a poster URL is valid for Next.js Image component.
+ * Must be an absolute URL (http/https) or a relative path starting with /
+ */
+const isValidPosterUrl = (url: string | undefined): boolean => {
+  if (!url || typeof url !== 'string') return false;
+  return url.startsWith('http://') || url.startsWith('https://') || url.startsWith('/');
+};
+
 interface MovieDetailsPageProps {
   params: Promise<{
     id: string;
@@ -202,7 +211,7 @@ export default function MovieDetailsPage({ params }: MovieDetailsPageProps) {
         ) : (
           <div className={pageStyles.movieDetails}>
             <div className={pageStyles.posterSection}>
-              {movie.poster ? (
+              {isValidPosterUrl(movie.poster) ? (
                 <div className={pageStyles.posterContainer}>
                   <Image
                     src={movie.poster!}

mflix/server/java-spring/src/main/java/com/mongodb/samplemflix/controller/MovieControllerImpl.java

@@ -1,5 +1,6 @@
 package com.mongodb.samplemflix.controller;
 
+import com.mongodb.samplemflix.exception.ValidationException;
 import com.mongodb.samplemflix.model.Movie;
 import com.mongodb.samplemflix.model.dto.BatchInsertResponse;
 import com.mongodb.samplemflix.model.dto.BatchUpdateResponse;
@@ -85,7 +86,27 @@ public ResponseEntity<SuccessResponse<List<Movie>>> getAllMovies(
             @RequestParam(defaultValue = "title") String sortBy,
             @Parameter(description = "Sort order: 'asc' or 'desc' (default: asc)")
             @RequestParam(defaultValue = "asc") String sortOrder) {
-        
+
+        // The sample_mflix dataset only contains movies up to 2015
+        final int MAX_DATASET_YEAR = 2015;
+        final int MIN_VALID_YEAR = 1800;
+        String yearWarning = null;
+
+        // Validate year if provided
+        if (year != null) {
+            if (year < MIN_VALID_YEAR) {
+                throw new ValidationException(
+                    String.format("Invalid year: %d. Year must be %d or later.", year, MIN_VALID_YEAR)
+                );
+            }
+            if (year > MAX_DATASET_YEAR) {
+                yearWarning = String.format(
+                    "Note: The sample_mflix dataset only contains movies up to %d. Your search for year %d may return no results.",
+                    MAX_DATASET_YEAR, year
+                );
+            }
+        }
+
         MovieSearchQuery query = MovieSearchQuery.builder()
                 .q(q)
                 .genre(genre)
@@ -97,16 +118,22 @@ public ResponseEntity<SuccessResponse<List<Movie>>> getAllMovies(
                 .sortBy(sortBy)
                 .sortOrder(sortOrder)
                 .build();
-        
+
         List<Movie> movies = movieService.getAllMovies(query);
-        
+
+        // Build response message, including year warning if applicable
+        String message = "Found " + movies.size() + " movies";
+        if (yearWarning != null) {
+            message = message + ". " + yearWarning;
+        }
+
         SuccessResponse<List<Movie>> response = SuccessResponse.<List<Movie>>builder()
                 .success(true)
-                .message("Found " + movies.size() + " movies")
+                .message(message)
                 .data(movies)
                 .timestamp(Instant.now().toString())
                 .build();
-        
+
         return ResponseEntity.ok(response);
     }
 

mflix/server/java-spring/src/test/java/com/mongodb/samplemflix/controller/MovieControllerTest.java

@@ -125,6 +125,47 @@ void testGetAllMovies_WithQueryParams() throws Exception {
                 .andExpect(jsonPath("$.data").isArray());
     }
 
+    @Test
+    @DisplayName("GET /api/movies - Should return 400 for year before 1800")
+    void testGetAllMovies_InvalidYearBefore1800() throws Exception {
+        // Act & Assert
+        mockMvc.perform(get("/api/movies")
+                        .param("year", "1700"))
+                .andExpect(status().isBadRequest())
+                .andExpect(jsonPath("$.success").value(false))
+                .andExpect(jsonPath("$.error.code").value("VALIDATION_ERROR"));
+    }
+
+    @Test
+    @DisplayName("GET /api/movies - Should include warning for year after 2015")
+    void testGetAllMovies_YearAfter2015IncludesWarning() throws Exception {
+        // Arrange
+        List<Movie> movies = Arrays.asList();
+        when(movieService.getAllMovies(any(MovieSearchQuery.class))).thenReturn(movies);
+
+        // Act & Assert
+        mockMvc.perform(get("/api/movies")
+                        .param("year", "2020"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.success").value(true))
+                .andExpect(jsonPath("$.message", containsString("2015")));
+    }
+
+    @Test
+    @DisplayName("GET /api/movies - Should not include warning for year 2015 or earlier")
+    void testGetAllMovies_Year2015NoWarning() throws Exception {
+        // Arrange
+        List<Movie> movies = Arrays.asList(testMovie);
+        when(movieService.getAllMovies(any(MovieSearchQuery.class))).thenReturn(movies);
+
+        // Act & Assert
+        mockMvc.perform(get("/api/movies")
+                        .param("year", "2015"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.success").value(true))
+                .andExpect(jsonPath("$.message", not(containsString("sample_mflix"))));
+    }
+
     // ==================== GET MOVIE BY ID TESTS ====================
 
     @Test

mflix/server/js-express/src/controllers/movieController.ts

@@ -87,9 +87,32 @@ export async function getAllMovies(req: Request, res: Response): Promise<void> {
     filter.genres = { $regex: new RegExp(genre, "i") };
   }
 
-  // Year filtering
+  // Year filtering and validation
+  // The sample_mflix dataset only contains movies up to 2015
+  const MAX_DATASET_YEAR = 2015;
+  const MIN_VALID_YEAR = 1800;
+  let yearWarning: string | undefined;
+
   if (year) {
-    filter.year = parseInt(year);
+    const yearNum = parseInt(year);
+
+    // Validate year is within reasonable bounds
+    if (yearNum < MIN_VALID_YEAR) {
+      res.status(400).json(
+        createErrorResponse(
+          `Invalid year: ${yearNum}. Year must be ${MIN_VALID_YEAR} or later.`,
+          "INVALID_YEAR"
+        )
+      );
+      return;
+    }
+
+    // Warn if searching for years beyond the dataset's range
+    if (yearNum > MAX_DATASET_YEAR) {
+      yearWarning = `Note: The sample_mflix dataset only contains movies up to ${MAX_DATASET_YEAR}. Your search for year ${yearNum} may return no results.`;
+    }
+
+    filter.year = yearNum;
   }
 
   // Rating range filtering
@@ -131,8 +154,14 @@ export async function getAllMovies(req: Request, res: Response): Promise<void> {
     .skip(skipNum)
     .toArray();
 
+  // Build response message, including year warning if applicable
+  let message = `Found ${movies.length} movies`;
+  if (yearWarning) {
+    message = `${message}. ${yearWarning}`;
+  }
+
   // Return successful response
-  res.json(createSuccessResponse(movies, `Found ${movies.length} movies`));
+  res.json(createSuccessResponse(movies, message));
 }
 
 /**