我有id我的表的哈希键，returnItemId它是 GSI。这returnItemId是一个字符串，其中包含用逗号分隔的值。给定 GSI 的编号，我希望能够通过使用查询并获取包含它的正确项目contains
var params = {
"AttributeDefinitions": [ // describbes the key schema of the table
{
"AttributeName": "id",
"AttributeType": "S"
},
{
"AttributeName": "returnItemId",
"AttributeType": "S"
}
],
// Hash for Primary Table
"KeySchema": [
{
"AttributeName": "id",
"KeyType": "HASH"
}
],
"GlobalSecondaryIndexes": [
{
"IndexName": "ReturnItemIndex",
"KeySchema": [
{
"AttributeName": "returnItemId", //must match one of attributedefinitions names
"KeyType": "HASH"
}
],
"Projection": {
"ProjectionType": "ALL"
},
"ProvisionedThroughput": {
"ReadCapacityUnits": 5,
"WriteCapacityUnits": 5
}
}
],
"ProvisionedThroughput": {
"ReadCapacityUnits": 5,
"WriteCapacityUnits": 5
},
"TableName": "my-table"
};
dynamodb.createTable(params, function(err, data) {
if (err) ppJson(err); // an error occurred
else ppJson(data); // successful response
});然后我将创建 2 个项目
var params = {
TableName: 'my-table',
Item: {
"id": "the_first_item",
"returnItemId": "123,456,789"
},
};
docClient.put(params, function(err, data) {
if (err) ppJson(err); // an error occurred
else ppJson(data); // successful response
});第二项
var params = {
TableName: 'my-table',
Item: {
"id": "the_second_item",
"returnItemId": "987,654,321"
},
};
docClient.put(params, function(err, data) {
if (err) ppJson(err); // an error occurred
else ppJson(data); // successful response
});这两个项目看起来像
我正在尝试运行查询并987使用以下查询获取包含的正确项目。由于我的第一个项目有123,456,789并且第二个项目有987,654,321这个方法应该返回第二个项目。
var params = {
TableName: 'my-table',
IndexName: 'ReturnItemIndex', // optional (if querying an index)
KeyConditionExpression: 'contains(returnItemId, :return_id)',
//FilterExpression: 'contains(returnItemId, :return_id)', // a string representing a constraint on the attribute
ExpressionAttributeValues: { ':return_id': '987' },
};
docClient.query(params, function(err, data) {
if (err) ppJson(err); // an error occurred
else ppJson(data); // successful response
});但是在 keyconditionexpression 中使用 contains 时遇到错误。这种方法可行吗？