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0 foundation a literature club low code development member management applet (III)

2022-06-24 07:06:00 【Low code preacher】

1 Third articles ： Recharge record function development

1.1 Last article review

In the previous article, we implemented the member recharge record function , Encountered a BUG As a result, the new functions are not easy to use , And recorded .

1.2 This paper introduces

This article mainly introduces the development of recharge recording function , During daily business operation , It is not enough just to increase the balance , We also need to record the recharge , Convenient for members to view .

According to the traditional development method, we generally need to design the master sub table , The master table records the basic information of members , The sub table records the recharge information of members . But we don't do this in low code development , Why? ？ Because we are a document database , There is no need to follow the traditional design thinking .

How does it work ？ Just listen to me .

1.3 Modify the data source

We add an array field to the member data source , Used to record recharge information

Array fields are not enough , We also need to add business logic , So you need to use the custom method of the data source

Note that the custom method needs to be tested first , After passing the test, you can develop the page

Specific method

module.exports = async function (params, context) {

const newParams = Object.assign({}, params, {

updatedAt: Date.now(),

});

delete newParams.createdAt;

delete newParams._id;

const _ = context.database.command;

console.log(params.account);

let money=parseInt(params.account)

const result = await context.collection.doc(params._id).update({

account:_.inc(money),

addrecord:_.push({

money:params.account,

adddate:Date.now()

})

});

return { updated: result.updated };

}

Here we use the array operation of cloud development _.push, Each time the balance is increased, a new record is added to the array

{

money:params.account,

adddate:Date.now()

}

A pair of braces denotes an object , There are two properties in the object , They are the amount of this recharge and the current time , After the method is added, we can develop the page function

1.4 Page function development

The recharge function of the page is the same as that in the previous section , We just modified the method of recharging , Added the function of recharge record