DynamoDBのscanのFilterExpressionでネストしたクエリを使う

FilterExpressionは(条件1) OR ( (条件2) AND (条件3) )の様にネストできる。

var item = 'hoge';
var shipping_state1 = 'shippingA';
var shipping_state2 = 'shippingB';
var params = {
  TableName: 'Item',
  FilterExpression: '(items = :items) AND ((shipping_state=:shipping_state1) OR (shipping_state=:shipping_state2))',
  ExpressionAttributeValues: {
	':items':item,
	':shipping_state1':shipping_state1,
	':shipping_state2':shipping_state2
  }
}
dynamodb.scan(params).promise().then(function(data) {
	console.log(data);
}).catch(function (error) {
	console.log(error)
})

INを使う場合は(キー IN (:候補1,:候補2,:候補3)のようにする。

var item = 'hoge';
var shipping_state1 = 'shippingA';
var shipping_state2 = 'shippingB';
var params = {
  TableName: 'Site',
  FilterExpression: '(items = :items) AND (shipping_state IN (:shipping_state1,:shipping_state2,:shipping_state3))',
  ExpressionAttributeValues: {
	':items':item,
	':shipping_state1':shipping_state1,
	':shipping_state2':shipping_state2
  }
}
dynamodb.scan(params).promise().then(function(data) {
	console.log(data);
}).catch(function (error) {
	console.log(error)
})