Verify that the API call query parameters do not contain any null values

Question

Verify that the API call query parameters do not contain any null values

I need to figure out how to submit only the queryParams parameters with values that are not null. Here's the current code for the submit function:

onSubmit() {        
    const queryParams =
        '&name=' +
        this.name +
        '&date_from=' +
        this.startDate +
        '&date_to=' +
        this.endDate;

    this.callAPI({
        queryParams: queryParams
    });
}

I'm unsure about where to add the check for null values. I know trying something like this is incorrect:

this.callAPI({
    queryParams: queryParams !== null
});

What would be the right way to handle this?

javascript angular typescript api

Answer 1

Answer №1

I encountered this issue and decided to create my own custom function to address it.

const customizeParams = obj => {
    const parameters = new URLSearchParams();
    for (let [key, value] of Object.entries(obj)) {
        if (value) { // Validate input here for any specific condition you require
            parameters.append(key, value);
        }
    }
    return parameters;
};

You can use the function by passing an object with parameters like shown below:

{
  name: 'exampleName',
  date: 'someDate',
  ...
}

Answer 2

I encountered this issue and decided to create my own custom function to address it.

const customizeParams = obj => {
    const parameters = new URLSearchParams();
    for (let [key, value] of Object.entries(obj)) {
        if (value) { // Validate input here for any specific condition you require
            parameters.append(key, value);
        }
    }
    return parameters;
};

You can use the function by passing an object with parameters like shown below:

{
  name: 'exampleName',
  date: 'someDate',
  ...
}

Answer 3

Answer №2

queryParams is guaranteed to have a value because it is being treated as a string in the concatenation process.

To ensure that name, startDate, and endDate are not empty, each of them needs to be individually checked:

onSubmit() {
    if(!this.name || !this.startDate || !this.endDate){
        return;
    }

    const queryParams =
        '&name=' +
        this.name +
        '&date_from=' +
        this.startDate +
        '&date_to=' +
        this.endDate;

    this.callAPI({
        queryParams
    });
}

Answer 4

queryParams is guaranteed to have a value because it is being treated as a string in the concatenation process.

To ensure that name, startDate, and endDate are not empty, each of them needs to be individually checked:

onSubmit() {
    if(!this.name || !this.startDate || !this.endDate){
        return;
    }

    const queryParams =
        '&name=' +
        this.name +
        '&date_from=' +
        this.startDate +
        '&date_to=' +
        this.endDate;

    this.callAPI({
        queryParams
    });
}

Answer 5

Answer №3

The recommended approach is to perform the task as follows:

const queryParams = `${this.name !== null ? '&name=' + this.name : ''}${this.startDate !== null ? '&date_from=' + this.startDate : ''}${this.endDate !== null ? '&date_to=' + this.endDate : ''}`; 

this.callAPI({
        queryParams: queryParams
    });

In this solution, a template string is utilized for efficient variable concatenation within strings. The ternary operator is also employed for concise conditional operations.

Answer 6

The recommended approach is to perform the task as follows:

const queryParams = `${this.name !== null ? '&name=' + this.name : ''}${this.startDate !== null ? '&date_from=' + this.startDate : ''}${this.endDate !== null ? '&date_to=' + this.endDate : ''}`; 

this.callAPI({
        queryParams: queryParams
    });

In this solution, a template string is utilized for efficient variable concatenation within strings. The ternary operator is also employed for concise conditional operations.

Answer 7

Answer №4

It is crucial that queryParams is not null, as you are including '&name=', '&date_from=', and '&date_to' in the string even if this.name, this.startDate, and this.endDate are null or undefined.

To address this issue, consider implementing the following:

onSubmission() {  
     if(this.name && this.startDate && this.endDate)
     {
        const queryParams =
        '&name=' +
        this.name +
        '&date_from=' +
        this.startDate +
        '&date_to=' +
        this.endDate;

        this.makeAPICall({
           queryParams: queryParams
         });

     }     
   }

Answer 8

It is crucial that queryParams is not null, as you are including '&name=', '&date_from=', and '&date_to' in the string even if this.name, this.startDate, and this.endDate are null or undefined.

To address this issue, consider implementing the following:

onSubmission() {  
     if(this.name && this.startDate && this.endDate)
     {
        const queryParams =
        '&name=' +
        this.name +
        '&date_from=' +
        this.startDate +
        '&date_to=' +
        this.endDate;

        this.makeAPICall({
           queryParams: queryParams
         });

     }     
   }

Answer 9

Answer №5

Easy Method

handleSubmission() {      

    const { username, start, end } = this;

    let queryParams = ``;

    if(username) {
        queryParams.concat(`&username=${username}`)
    }
    if(start) {
        queryParams.concat(`&start_date=${start}`)
    }
    if(end) {
        queryParams.concat(`&end_date=${end}`)
    }

    this.triggerAPI({
        data: queryParams
    });
}

Answer 10

Easy Method

handleSubmission() {      

    const { username, start, end } = this;

    let queryParams = ``;

    if(username) {
        queryParams.concat(`&username=${username}`)
    }
    if(start) {
        queryParams.concat(`&start_date=${start}`)
    }
    if(end) {
        queryParams.concat(`&end_date=${end}`)
    }

    this.triggerAPI({
        data: queryParams
    });
}

Answer 11

Answer №6

Create an object with various values, remove any empty ones, and then construct a query string dynamically:

const data = {
    brand: this.brand, 
    price_min: this.minPrice, 
    price_max: this.maxPrice
};

const queryString = Object.keys(data)
    .filter(key => data[key] !== null)
    .map(key => `${key}=${encodeURIComponent(data[key])}`)
    .join('&');

this.sendRequest({ queryString });

Example:

const data = {
  apple: 'fruit',
  banana: null,
  cherry: 25
};

const queryString = Object.keys(data)
  .filter(key => data[key] !== null)
  .map(key => `${key}=${encodeURIComponent(data[key])}`)
  .join('&');
  
console.log(queryString);

Answer 12

Create an object with various values, remove any empty ones, and then construct a query string dynamically:

const data = {
    brand: this.brand, 
    price_min: this.minPrice, 
    price_max: this.maxPrice
};

const queryString = Object.keys(data)
    .filter(key => data[key] !== null)
    .map(key => `${key}=${encodeURIComponent(data[key])}`)
    .join('&');

this.sendRequest({ queryString });

Example:

const data = {
  apple: 'fruit',
  banana: null,
  cherry: 25
};

const queryString = Object.keys(data)
  .filter(key => data[key] !== null)
  .map(key => `${key}=${encodeURIComponent(data[key])}`)
  .join('&');
  
console.log(queryString);

Verify that the API call query parameters do not contain any null values

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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