remove nested array from json array - mysql

Question

How do i go about returning only the json without the [] from a Mysql multiple query?
I have this as an SQL Query
app.get('/api/v1/admin/getAllUsers',async function (req,res,next){
try {
if (!req.headers.authorization || !req.headers.authorization.startsWith('Bearer ') || !req.headers.authorization.split(' ')[1]) {
return res.status(422).json({ message: 'Please Provide Token!' })
}
dbConn.query('select * from fasta_users; select * from fasta_logistics; select * from fasta_admin_users;select * from fasta_riders;', function (error, results, fields) {
if (error) throw error;
return res.send({ error: false, data: results, message: 'users list' });
});
} catch (err) {
next(err);
}
})
having run this, I get this as response :
{
"error": false,
"data": [
[
{
"id": 1,
"fastaUserId": "",
"fullname": "John Qasim",
"email": "j_qasim001#aol.com",
"password": "$2a$12$iAzLsIEcOJpDSSgdUmJBR.e8pWdieUg7N4bFiW0lkgBsQQDA6DwPG",
"state": "Imo",
"role": "Customers",
"city": "Owerri",
"phone_num": "08076631261",
"created_at": "2022-05-17T15:58:26.000Z"
}
],
[
{
"id": 1,
"fastaUserId": "",
"fullname": "alex roman",
"email": "alex.roman#juno.com",
"password": "$2a$12$sXpfYaQQIwoBf1KMaPrgT.PioHY4Y6SXD1lpheDB9EPTwfRtsg1p.",
"state": "Lagos",
"city": "city",
"phone_num": "08111111111",
"company_type": "Registered",
"company_name": "Polaris Shipping Inc.",
"company_regnum": "RC-123456",
"c_license": 1,
"role": "Delivery man",
"l_licensenumber": "LAG-2372328",
"company_address": "150 Wole Madariola Close",
"num_employees": "200",
"company_nature": "Sole Propietorship",
"created_at": "2022-05-17T15:57:41.000Z"
}
],
[
{
"id": 1,
"fastaUserId": "",
"fullname": "John Legend",
"email": "john.legend#gmail.com",
"password": "$2a$12$KrW0YKsJmvlp2z5uF4V10uLIjcPpSl1ba/LiWuiRpaLs/XRmguXDy",
"phone_num": "0188272610",
"avatar": "test_pic",
"role": "Administrator",
"status": "Active",
"created_at": "2022-05-11T18:48:39.000Z"
}
],
[
{
"id": 1,
"Name": "Karen Mitchelle",
"RidersID": "FR-60842",
"Status": "Active",
"email": "k.m.boon#gmail.com",
"password": "$2a$12$PCTK8okWO/ApoNSgXXTIl.oxzwqf.zlHHJaEvxtfxpUrnI1IaGNQC",
"phone": "08128829102",
"No_deliveries": "200",
"rating": "5",
"state": "Lagos",
"city": "Lagos",
"role": "Rider",
"address": "150 Wole Kolawole Str. Lagos Nigeria",
"bike_manufacturer": "Suzuki",
"bike_model": "Suzuki 400",
"bike_year": "2012",
"engine_power": "HP8",
"bike_color": "red",
"license_number": "SMK900-LA",
"license_expiry": "2027-05-01",
"vehicle_id": "LA8373Q2",
"created_at": "2022-05-17T15:59:22.000Z"
}
]
],
"message": "users list"
}
I just want it to return just the json object alone. How is this possible?
Please I need a guide with this,How can I get this resolved? I need a guide with this.
is there a way to make it be like this :
{
"error":false,
"data":{
"id": 1,
"fastaUserId": "",
"fullname": "John Qasim",
"email": "j_qasim001#aol.com",
"password": "$2a$12$iAzLsIEcOJpDSSgdUmJBR.e8pWdieUg7N4bFiW0lkgBsQQDA6DwPG",
"state": "Imo",
"role": "Customers",
"city": "Owerri",
"phone_num": "08076631261",
"created_at": "2022-05-17T15:58:26.000Z",
{
"id": 1,
"fastaUserId": "",
"fullname": "alex roman",
"email": "alex.roman#juno.com",
"password": "$2a$12$sXpfYaQQIwoBf1KMaPrgT.PioHY4Y6SXD1lpheDB9EPTwfRtsg1p.",
"state": "Lagos",
"city": "city",
"phone_num": "08111111111",
"company_type": "Registered",
"company_name": "Polaris Shipping Inc.",
"company_regnum": "RC-123456",
"c_license": 1,
"role": "Delivery man",
"l_licensenumber": "LAG-2372328",
"company_address": "150 Wole Madariola Close",
"num_employees": "200",
"company_nature": "Sole Propietorship",
"created_at": "2022-05-17T15:57:41.000Z"
},
{
"id": 1,
"fastaUserId": "",
"fullname": "John Legend",
"email": "john.legend#gmail.com",
"password": "$2a$12$KrW0YKsJmvlp2z5uF4V10uLIjcPpSl1ba/LiWuiRpaLs/XRmguXDy",
"phone_num": "0188272610",
"avatar": "test_pic",
"role": "Administrator",
"status": "Active",
"created_at": "2022-05-11T18:48:39.000Z"
},
{
"id": 1,
"Name": "Karen Mitchelle",
"RidersID": "FR-60842",
"Status": "Active",
"email": "k.m.boon#gmail.com",
"password": "$2a$12$PCTK8okWO/ApoNSgXXTIl.oxzwqf.zlHHJaEvxtfxpUrnI1IaGNQC",
"phone": "08128829102",
"No_deliveries": "200",
"rating": "5",
"state": "Lagos",
"city": "Lagos",
"role": "Rider",
"address": "150 Wole Kolawole Str. Lagos Nigeria",
"bike_manufacturer": "Suzuki",
"bike_model": "Suzuki 400",
"bike_year": "2012",
"engine_power": "HP8",
"bike_color": "red",
"license_number": "SMK900-LA",
"license_expiry": "2027-05-01",
"vehicle_id": "LA8373Q2",
"created_at": "2022-05-17T15:59:22.000Z"
}
}
}
Edits
My code is Looking like this now :
app.get('/api/v1/admin/getAllUsers',async function (req,res,next){
try {
if (!req.headers.authorization || !req.headers.authorization.startsWith('Bearer ') || !req.headers.authorization.split(' ')[1]) {
return res.status(422).json({ message: 'Please Provide Token!' })
}
dbConn.query('select * from fasta_users; select * from fasta_admin_users;select * from fasta_riders;', function (error, results, fields) {
if (error) throw error;
const infoz = results.data.map(arr =>arr[0]);
return res.send({ error: false, data: infoz, message: 'users list' });
});
} catch (err) {
next(err);
}
})
It still returns the nested array.

Answer 1

You can user Array#map() and get first user from nested array using Destructuring assignment
Code:
const response = {error: false,data: [[{id: 1,fastaUserId: '',fullname: 'John Qasim',email: 'j_qasim001#aol.com',password: '$2a$12$iAzLsIEcOJpDSSgdUmJBR.e8pWdieUg7N4bFiW0lkgBsQQDA6DwPG',state: 'Imo',role: 'Customers',city: 'Owerri',phone_num: '08076631261',created_at: '2022-05-17T15:58:26.000Z',},],[{id: 1,fastaUserId: '',fullname: 'alex roman',email: 'alex.roman#juno.com',password: '$2a$12$sXpfYaQQIwoBf1KMaPrgT.PioHY4Y6SXD1lpheDB9EPTwfRtsg1p.',state: 'Lagos',city: 'city',phone_num: '08111111111',company_type: 'Registered',company_name: 'Polaris Shipping Inc.',company_regnum: 'RC-123456',c_license: 1,role: 'Delivery man',l_licensenumber: 'LAG-2372328',company_address: '150 Wole Madariola Close',num_employees: '200',company_nature: 'Sole Propietorship',created_at: '2022-05-17T15:57:41.000Z',},],[{id: 1,fastaUserId: '',fullname: 'John Legend',email: 'john.legend#gmail.com',password: '$2a$12$KrW0YKsJmvlp2z5uF4V10uLIjcPpSl1ba/LiWuiRpaLs/XRmguXDy',phone_num: '0188272610',avatar: 'test_pic',role: 'Administrator',status: 'Active',created_at: '2022-05-11T18:48:39.000Z',},],[{id: 1,Name: 'Karen Mitchelle',RidersID: 'FR-60842',Status: 'Active',email: 'k.m.boon#gmail.com',password: '$2a$12$PCTK8okWO/ApoNSgXXTIl.oxzwqf.zlHHJaEvxtfxpUrnI1IaGNQC',phone: '08128829102',No_deliveries: '200',rating: '5',state: 'Lagos',city: 'Lagos',role: 'Rider',address: '150 Wole Kolawole Str. Lagos Nigeria',bike_manufacturer: 'Suzuki',bike_model: 'Suzuki 400',bike_year: '2012',engine_power: 'HP8',bike_color: 'red',license_number: 'SMK900-LA',license_expiry: '2027-05-01',vehicle_id: 'LA8373Q2',created_at: '2022-05-17T15:59:22.000Z',},],],message: 'users list',}
response.data = response.data.map(([user]) => user)
console.log(response)
.as-console-wrapper { max-height: 100% !important; top: 0; }
Also you can use Array#flat()
Code:
const response = {error: false,data: [[{id: 1,fastaUserId: '',fullname: 'John Qasim',email: 'j_qasim001#aol.com',password: '$2a$12$iAzLsIEcOJpDSSgdUmJBR.e8pWdieUg7N4bFiW0lkgBsQQDA6DwPG',state: 'Imo',role: 'Customers',city: 'Owerri',phone_num: '08076631261',created_at: '2022-05-17T15:58:26.000Z',},],[{id: 1,fastaUserId: '',fullname: 'alex roman',email: 'alex.roman#juno.com',password: '$2a$12$sXpfYaQQIwoBf1KMaPrgT.PioHY4Y6SXD1lpheDB9EPTwfRtsg1p.',state: 'Lagos',city: 'city',phone_num: '08111111111',company_type: 'Registered',company_name: 'Polaris Shipping Inc.',company_regnum: 'RC-123456',c_license: 1,role: 'Delivery man',l_licensenumber: 'LAG-2372328',company_address: '150 Wole Madariola Close',num_employees: '200',company_nature: 'Sole Propietorship',created_at: '2022-05-17T15:57:41.000Z',},],[{id: 1,fastaUserId: '',fullname: 'John Legend',email: 'john.legend#gmail.com',password: '$2a$12$KrW0YKsJmvlp2z5uF4V10uLIjcPpSl1ba/LiWuiRpaLs/XRmguXDy',phone_num: '0188272610',avatar: 'test_pic',role: 'Administrator',status: 'Active',created_at: '2022-05-11T18:48:39.000Z',},],[{id: 1,Name: 'Karen Mitchelle',RidersID: 'FR-60842',Status: 'Active',email: 'k.m.boon#gmail.com',password: '$2a$12$PCTK8okWO/ApoNSgXXTIl.oxzwqf.zlHHJaEvxtfxpUrnI1IaGNQC',phone: '08128829102',No_deliveries: '200',rating: '5',state: 'Lagos',city: 'Lagos',role: 'Rider',address: '150 Wole Kolawole Str. Lagos Nigeria',bike_manufacturer: 'Suzuki',bike_model: 'Suzuki 400',bike_year: '2012',engine_power: 'HP8',bike_color: 'red',license_number: 'SMK900-LA',license_expiry: '2027-05-01',vehicle_id: 'LA8373Q2',created_at: '2022-05-17T15:59:22.000Z',},],],message: 'users list',}
response.data = response.data.flat()
console.log(response)