Fix escaping issue in filterExpression for RedisVectorStore file name filtering

Signed-off-by: Minu Kim <[email protected]>

Author: kmw10693

spring-ai-vector-store/src/main/java/org/springframework/ai/vectorstore/SearchRequest.java

@@ -24,6 +24,8 @@
 import org.springframework.ai.vectorstore.filter.FilterExpressionTextParser;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
 
 /**
  * Similarity search request. Use the {@link SearchRequest#builder()} to create the
@@ -283,10 +285,22 @@ public Builder filterExpression(@Nullable Filter.Expression expression) {
 		 */
 		public Builder filterExpression(@Nullable String textExpression) {
 			this.searchRequest.filterExpression = (textExpression != null)
-					? new FilterExpressionTextParser().parse(textExpression) : null;
+					? new FilterExpressionTextParser().parse(escapeTextExpression(textExpression)) : null;
 			return this;
 		}
 
+		private String escapeTextExpression(String expression) {
+			Pattern pattern = Pattern.compile("'([^']*)'");
+			Matcher matcher = pattern.matcher(expression);
+			StringBuffer sb = new StringBuffer();
+			while (matcher.find()) {
+				String content = matcher.group(1).replace("\\", "\\\\").replace(".", "\\.");
+				matcher.appendReplacement(sb, "'" + content + "'");
+			}
+			matcher.appendTail(sb);
+			return sb.toString();
+		}
+
 		public SearchRequest build() {
 			return this.searchRequest;
 		}