Amazon dynamodb 更新DynamoDB中的项时出现错误,使用NodeJS更新表达式无效
这是我的处理函数Amazon dynamodb 更新DynamoDB中的项时出现错误,使用NodeJS更新表达式无效,amazon-dynamodb,Amazon Dynamodb,这是我的处理函数 const updateOrder = (request) => { const id = request.pathParams.id; const orderObject = request.body; if(!id || !orderObject) throw new Error ('Please provide required id and object in order to update the order')
const updateOrder = (request) => {
const id = request.pathParams.id;
const orderObject = request.body;
if(!id || !orderObject)
throw new Error ('Please provide required id and object in order to update the order')
const params = {
TableName: "pizza-order",
Key: {
"orderId": id
},
UpdateExpression: "SET #n = :n, #a = :a ",
ExpressionAttributeNames: {
"#n": "pizza",
"#a": "address"
},
ConditionExpression: '' ,
ExpressionAttributeValues: {
":n": orderObject.pizza,
":a": orderObject.address,
},
};
return docClient.update(params).promise()
}
订单对象为:
{
"pizza":"THe outstanding pizza",
"Address": "feni"
}
它返回这样的错误。我不知道为什么会这样。对于无服务器开发来说是非常新的。有人知道解决办法吗?这是一个非常愚蠢的错误。order对象中首先有一个输入错误:
{
"pizza":"THe outstanding pizza",
"address": "feni" //previously it was Address: "feni
}
第二个原因是ConditionExpression不能为空
const updateOrder = (request) => {
const id = request.pathParams.id;
const orderObject = request.body;
if(!id || !orderObject)
throw new Error ('Please provide required id and object in order to update the order')
const params = {
TableName: "pizza-order",
Key: {
"orderId": id
},
UpdateExpression: "SET #n = :n, #a = :a ",
ExpressionAttributeNames: {
"#n": "pizza",
"#a": "address"
},
ConditionExpression: '' , // this can not be empty
ExpressionAttributeValues: {
":n": orderObject.pizza,
":a": orderObject.address,
},
};
return docClient.update(params).promise()
}