favorite API (CRD)

favorite_transport_create

import boto3
import json
from boto3.dynamodb.conditions import Key, Attr

dynamodb = boto3.resource("dynamodb", region_name = "ap-northeast-2")
table = dynamodb.Table("map_filter")

def lambda_handler(event, context):
    count = table.scan()["Count"]
    
    if count == 3:
        return {'isFull': 1}

    First = event["body-json"]["First"]
    Second = event["body-json"]["Second"]
    Third = event["body-json"]["Third"]
    Year = event["body-json"]["Year"]
    Emissions = event["body-json"]["Emissions"]

    response = table.put_item(
        Item = {
            'idx': count,
            'First': First,
            'Second': Second,
            'Third': Third,
            'Year': Year,
            'Emissions': Emissions,
        }
    )
    response["isFull"] = 0
    
    return response

POST

favorite_transport_delete

import boto3
import json
from boto3.dynamodb.conditions import Key, Attr

dynamodb = boto3.resource("dynamodb", region_name = "ap-northeast-2")
table = dynamodb.Table("map_filter")

def idx_sort():
    count = table.scan()['Count']
    items = table.scan()['Items']
    
    if count == 2:
        tmp = table.scan()['Items']
        for t in tmp:
            table.delete_item(
                Key = {
                    'idx': t['idx']
                }    
            )
        items[1]['idx'] = 0
        items[0]['idx'] = 1
        table.put_item(
            Item = items[0]
        )
        table.put_item(
            Item = items[1]
        )
    elif count == 1:
        tmp = table.scan()['Items']
        for t in tmp:
            table.delete_item(
                Key = {
                    'idx': t['idx']
                }    
            )
        items[0]['idx'] = 0
        table.put_item(
            Item = items[0]    
        )
    else: # count == 0
        return 0
        
def lambda_handler(event, context):
    idx = int(event["body-json"]["idx"])
    table.delete_item(
        Key={
            'idx' : idx
        }
    )
    idx_sort()
    return 0

DELETE

favorite_transport_read

import boto3
import json
from boto3.dynamodb.conditions import Key

dynamodb = boto3.resource("dynamodb", region_name = "ap-northeast-2")
table = dynamodb.Table("map_filter")

def lambda_handler(event, context):
    response = table.scan()
    item = response["Items"]
    return item

READ