Java - 无法执行AQL查询

Question

如何修复AQL语法错误？我正在尝试使用查询创建边缘，但会出现以下错误：

无法执行查询。响应：400，错误：1501 - AQL：语法错误，位于1:57的'@edges'附近的查询字符串意外结束（解析时）

用于执行查询的代码：

try {

 String query = "INSERT { _from:TurmaA._teste2, _to:TurmaA._testepedro } IN @edges";
 Map<String, Object> bindVars = new MapBuilder().put("edges", nome2).get();
 ArangoCursor<BaseDocument> cursor = arangoDB.db(dbName).query(query, bindVars, 
null, BaseDocument.class);

cursor.forEachRemaining(aDocument -> {
  System.out.println("Key: " + aDocument.getKey());
 });
} catch (ArangoDBException e) {
 System.err.println("Failed to execute query. " + e.getMessage());
}

Answer 1

请注意collection bind variables have to be prefixed by two @@。

所以你的代码示例可能很容易修复如下：

try {

 String query = "INSERT { _from:TurmaA._teste2, _to:TurmaA._testepedro } IN @@edges";
 Map<String, Object> bindVars = new MapBuilder().put("@edges", nome2).get();
 ArangoCursor<BaseDocument> cursor = arangoDB.db(dbName).query(query, bindVars, 
null, BaseDocument.class);

cursor.forEachRemaining(aDocument -> {
  System.out.println("Key: " + aDocument.getKey());
 });
} catch (ArangoDBException e) {
 System.err.println("Failed to execute query. " + e.getMessage());
}