如何使用javascript增量方法增加数据库中的计数? [英] How to Increase counts in database using javascript increment method?

问题描述

我的数据库中有一个名为 ads_counter 的字段，每次展示此广告时，我都需要增加其值.

我想在节点单击api中实现javascript的增量功能，当用户单击时，我将在请求中获得 1 ，而我在数据库中将 1 增加了no.例如，如果我有 ads_counter = 5 ，并且我从客户端获得了要求，则将no增加 1 .所以，我怎么增加不.数据库中 ads_counter 的数量.我不知道从哪里开始，我在Postgres数据库中使用Sequelize.请给我建议做这个建议的好方法.

解决方案

我想我的答案我必须在我的节点api中添加以下代码，我必须从客户端获取 product_id 此api将使 ads_counter 增加1.

  Product.update({ads_counter:sequelize.literal('ads_counter + 1')}，{其中:{id:req.body.id}}); 

这是git问题的链接，>

I have field called ads_counter in my database, and I need to increase its value each time when this ad is rendered.

I want to implement increment function of javascript in node rest api when be clicked by users I will get 1 in request I have increase no in database by 1. for example If I have ads_counter = 5 and I get req from client side to increase no by 1. so, how can I increase no. of ads_counter in database. I'm not able to understand from where to start I am using Sequelize with postgres database. please suggest me good method to do this opreation.

解决方案

I think I got The answer I have to add below code in my node api I have to get product_id from the client side and this api will increase the ads_counter by 1.

Product.update({ ads_counter: sequelize.literal('ads_counter+ 1') }, { where: { id: req.body.id } });

this is the link of git issue from where I got my answer

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