react native - undefined is not an object(evaluating 'password.toString')
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1
So, basically, I have two JavaScript files, in one of them there's a function that authenticates to an API and the other one is the login screen running in the emulator. When I try to authenticate, I get the error:
undefined is not an object (evaluating 'password.toString')
This is the login screen file:
import React, {Component} from 'react';
import {View, Text, TextInput, TouchableOpacity} from 'react-native';
import styles from './login-styles';
import {auth} from '../../fetches/auth';
class LoginBox extends Component {
constructor(props) {
super(props)
this.state = {
username: '',
password: ''
}
}
render = () => {
return(
<View style={styles.box}>
<View style={styles.header}>
<Text style={{fontSize: 28}}>Bem-vindo ao PostBag v 0.0.2</Text>
</View>
<View styles={styles.app}>
<TextInput style={styles.square}
keyboardType="numeric"
placeholder='Insira sua matrúcla'
onChangeText={(text) => this.setState({username: text})}
value={this.state.username}
/>
<TextInput style={styles.square}
secureTextEntry
placeholder='Insira sua senha'
onChangeText={(text) => this.setState({password: text})}
value={this.state.password}
/>
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
<Text style={styles.buttonTxt}>POST</Text>
</TouchableOpacity>
</View>
</View>
)
}
}
export default LoginBox;This is the authentication function:
import {Alert} from 'react-native';
export function auth(username, password) {
fetch('https://suap.ifrn.edu.br:443/api/v2/autenticacao/token/',
{
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
'x-csrftoken': 'NDML6yy6HgTUIoypfWMZHMKZ32lgJf5PsNolVnLgewanw5YM4rqwkuvgkyAhEYEA'
},
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
}).then(function(response) {
var json = response.json()
json.then((data) => {
token = data.token
if (typeof token === 'undefined') {
Alert.alert('Não foi possível fazer login')
}
else {
Alert.alert('Login feito com sucesso')
}
})
})
}I would really appreciate if anyone could help me with that. Everything that I tried did not work.
javascript reactjs react-native
edited Nov 24 '18 at 18:08
Heretic Monkey
6,58863673
asked Nov 24 '18 at 17:34
B. VilelaB. Vilela
82
add a comment |
1
So, basically, I have two JavaScript files, in one of them there's a function that authenticates to an API and the other one is the login screen running in the emulator. When I try to authenticate, I get the error:
undefined is not an object (evaluating 'password.toString')
This is the login screen file:
import React, {Component} from 'react';
import {View, Text, TextInput, TouchableOpacity} from 'react-native';
import styles from './login-styles';
import {auth} from '../../fetches/auth';
class LoginBox extends Component {
constructor(props) {
super(props)
this.state = {
username: '',
password: ''
}
}
render = () => {
return(
<View style={styles.box}>
<View style={styles.header}>
<Text style={{fontSize: 28}}>Bem-vindo ao PostBag v 0.0.2</Text>
</View>
<View styles={styles.app}>
<TextInput style={styles.square}
keyboardType="numeric"
placeholder='Insira sua matrúcla'
onChangeText={(text) => this.setState({username: text})}
value={this.state.username}
/>
<TextInput style={styles.square}
secureTextEntry
placeholder='Insira sua senha'
onChangeText={(text) => this.setState({password: text})}
value={this.state.password}
/>
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
<Text style={styles.buttonTxt}>POST</Text>
</TouchableOpacity>
</View>
</View>
)
}
}
export default LoginBox;This is the authentication function:
import {Alert} from 'react-native';
export function auth(username, password) {
fetch('https://suap.ifrn.edu.br:443/api/v2/autenticacao/token/',
{
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
'x-csrftoken': 'NDML6yy6HgTUIoypfWMZHMKZ32lgJf5PsNolVnLgewanw5YM4rqwkuvgkyAhEYEA'
},
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
}).then(function(response) {
var json = response.json()
json.then((data) => {
token = data.token
if (typeof token === 'undefined') {
Alert.alert('Não foi possível fazer login')
}
else {
Alert.alert('Login feito com sucesso')
}
})
})
}I would really appreciate if anyone could help me with that. Everything that I tried did not work.
javascript reactjs react-native
edited Nov 24 '18 at 18:08
Heretic Monkey
6,58863673
asked Nov 24 '18 at 17:34
B. VilelaB. Vilela
82
1
What's going on here? =>auth((this.state.username, this.state.password)). You're using double parentheses for some reason. Isn't that giving you an error? Try removing one set and see if that makes a difference.
– Andy
Nov 24 '18 at 17:39
What happens when you throw aconsole.log('password:', password)right before yourfetchcall? Make sure you're actually passing the data to the function. The error indicates you might not be passing the data
– mccambridge
Nov 24 '18 at 18:13
add a comment |
1
1
1
So, basically, I have two JavaScript files, in one of them there's a function that authenticates to an API and the other one is the login screen running in the emulator. When I try to authenticate, I get the error:
undefined is not an object (evaluating 'password.toString')
This is the login screen file:
import React, {Component} from 'react';
import {View, Text, TextInput, TouchableOpacity} from 'react-native';
import styles from './login-styles';
import {auth} from '../../fetches/auth';
class LoginBox extends Component {
constructor(props) {
super(props)
this.state = {
username: '',
password: ''
}
}
render = () => {
return(
<View style={styles.box}>
<View style={styles.header}>
<Text style={{fontSize: 28}}>Bem-vindo ao PostBag v 0.0.2</Text>
</View>
<View styles={styles.app}>
<TextInput style={styles.square}
keyboardType="numeric"
placeholder='Insira sua matrúcla'
onChangeText={(text) => this.setState({username: text})}
value={this.state.username}
/>
<TextInput style={styles.square}
secureTextEntry
placeholder='Insira sua senha'
onChangeText={(text) => this.setState({password: text})}
value={this.state.password}
/>
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
<Text style={styles.buttonTxt}>POST</Text>
</TouchableOpacity>
</View>
</View>
)
}
}
export default LoginBox;This is the authentication function:
import {Alert} from 'react-native';
export function auth(username, password) {
fetch('https://suap.ifrn.edu.br:443/api/v2/autenticacao/token/',
{
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
'x-csrftoken': 'NDML6yy6HgTUIoypfWMZHMKZ32lgJf5PsNolVnLgewanw5YM4rqwkuvgkyAhEYEA'
},
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
}).then(function(response) {
var json = response.json()
json.then((data) => {
token = data.token
if (typeof token === 'undefined') {
Alert.alert('Não foi possível fazer login')
}
else {
Alert.alert('Login feito com sucesso')
}
})
})
}I would really appreciate if anyone could help me with that. Everything that I tried did not work.
javascript reactjs react-native
edited Nov 24 '18 at 18:08
Heretic Monkey
6,58863673
asked Nov 24 '18 at 17:34
B. VilelaB. Vilela
82
So, basically, I have two JavaScript files, in one of them there's a function that authenticates to an API and the other one is the login screen running in the emulator. When I try to authenticate, I get the error:
undefined is not an object (evaluating 'password.toString')
This is the login screen file:
import React, {Component} from 'react';
import {View, Text, TextInput, TouchableOpacity} from 'react-native';
import styles from './login-styles';
import {auth} from '../../fetches/auth';
class LoginBox extends Component {
constructor(props) {
super(props)
this.state = {
username: '',
password: ''
}
}
render = () => {
return(
<View style={styles.box}>
<View style={styles.header}>
<Text style={{fontSize: 28}}>Bem-vindo ao PostBag v 0.0.2</Text>
</View>
<View styles={styles.app}>
<TextInput style={styles.square}
keyboardType="numeric"
placeholder='Insira sua matrúcla'
onChangeText={(text) => this.setState({username: text})}
value={this.state.username}
/>
<TextInput style={styles.square}
secureTextEntry
placeholder='Insira sua senha'
onChangeText={(text) => this.setState({password: text})}
value={this.state.password}
/>
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
<Text style={styles.buttonTxt}>POST</Text>
</TouchableOpacity>
</View>
</View>
)
}
}
export default LoginBox;This is the authentication function:
import {Alert} from 'react-native';
export function auth(username, password) {
fetch('https://suap.ifrn.edu.br:443/api/v2/autenticacao/token/',
{
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
'x-csrftoken': 'NDML6yy6HgTUIoypfWMZHMKZ32lgJf5PsNolVnLgewanw5YM4rqwkuvgkyAhEYEA'
},
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
}).then(function(response) {
var json = response.json()
json.then((data) => {
token = data.token
if (typeof token === 'undefined') {
Alert.alert('Não foi possível fazer login')
}
else {
Alert.alert('Login feito com sucesso')
}
})
})
}I would really appreciate if anyone could help me with that. Everything that I tried did not work.
import React, {Component} from 'react';
import {View, Text, TextInput, TouchableOpacity} from 'react-native';
import styles from './login-styles';
import {auth} from '../../fetches/auth';
class LoginBox extends Component {
constructor(props) {
super(props)
this.state = {
username: '',
password: ''
}
}
render = () => {
return(
<View style={styles.box}>
<View style={styles.header}>
<Text style={{fontSize: 28}}>Bem-vindo ao PostBag v 0.0.2</Text>
</View>
<View styles={styles.app}>
<TextInput style={styles.square}
keyboardType="numeric"
placeholder='Insira sua matrúcla'
onChangeText={(text) => this.setState({username: text})}
value={this.state.username}
/>
<TextInput style={styles.square}
secureTextEntry
placeholder='Insira sua senha'
onChangeText={(text) => this.setState({password: text})}
value={this.state.password}
/>
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
<Text style={styles.buttonTxt}>POST</Text>
</TouchableOpacity>
</View>
</View>
)
}
}
export default LoginBox;import React, {Component} from 'react';
import {View, Text, TextInput, TouchableOpacity} from 'react-native';
import styles from './login-styles';
import {auth} from '../../fetches/auth';
class LoginBox extends Component {
constructor(props) {
super(props)
this.state = {
username: '',
password: ''
}
}
render = () => {
return(
<View style={styles.box}>
<View style={styles.header}>
<Text style={{fontSize: 28}}>Bem-vindo ao PostBag v 0.0.2</Text>
</View>
<View styles={styles.app}>
<TextInput style={styles.square}
keyboardType="numeric"
placeholder='Insira sua matrúcla'
onChangeText={(text) => this.setState({username: text})}
value={this.state.username}
/>
<TextInput style={styles.square}
secureTextEntry
placeholder='Insira sua senha'
onChangeText={(text) => this.setState({password: text})}
value={this.state.password}
/>
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
<Text style={styles.buttonTxt}>POST</Text>
</TouchableOpacity>
</View>
</View>
)
}
}
export default LoginBox;import {Alert} from 'react-native';
export function auth(username, password) {
fetch('https://suap.ifrn.edu.br:443/api/v2/autenticacao/token/',
{
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
'x-csrftoken': 'NDML6yy6HgTUIoypfWMZHMKZ32lgJf5PsNolVnLgewanw5YM4rqwkuvgkyAhEYEA'
},
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
}).then(function(response) {
var json = response.json()
json.then((data) => {
token = data.token
if (typeof token === 'undefined') {
Alert.alert('Não foi possível fazer login')
}
else {
Alert.alert('Login feito com sucesso')
}
})
})
}import {Alert} from 'react-native';
export function auth(username, password) {
fetch('https://suap.ifrn.edu.br:443/api/v2/autenticacao/token/',
{
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
'x-csrftoken': 'NDML6yy6HgTUIoypfWMZHMKZ32lgJf5PsNolVnLgewanw5YM4rqwkuvgkyAhEYEA'
},
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
}).then(function(response) {
var json = response.json()
json.then((data) => {
token = data.token
if (typeof token === 'undefined') {
Alert.alert('Não foi possível fazer login')
}
else {
Alert.alert('Login feito com sucesso')
}
})
})
}javascript reactjs react-native
javascript reactjs react-native
edited Nov 24 '18 at 18:08
Heretic Monkey
6,58863673
asked Nov 24 '18 at 17:34
B. VilelaB. Vilela
82
edited Nov 24 '18 at 18:08
Heretic Monkey
6,58863673
asked Nov 24 '18 at 17:34
B. VilelaB. Vilela
82
edited Nov 24 '18 at 18:08
Heretic Monkey
6,58863673
edited Nov 24 '18 at 18:08
Heretic Monkey
6,58863673
edited Nov 24 '18 at 18:08
Heretic Monkey
6,58863673
6,58863673
asked Nov 24 '18 at 17:34
B. VilelaB. Vilela
82
asked Nov 24 '18 at 17:34
B. VilelaB. Vilela
82
asked Nov 24 '18 at 17:34
B. VilelaB. Vilela
82
82
1
What's going on here? =>auth((this.state.username, this.state.password)). You're using double parentheses for some reason. Isn't that giving you an error? Try removing one set and see if that makes a difference.
– Andy
Nov 24 '18 at 17:39
What happens when you throw aconsole.log('password:', password)right before yourfetchcall? Make sure you're actually passing the data to the function. The error indicates you might not be passing the data
– mccambridge
Nov 24 '18 at 18:13
add a comment |
1
What's going on here? =>auth((this.state.username, this.state.password)). You're using double parentheses for some reason. Isn't that giving you an error? Try removing one set and see if that makes a difference.
– Andy
Nov 24 '18 at 17:39
What happens when you throw aconsole.log('password:', password)right before yourfetchcall? Make sure you're actually passing the data to the function. The error indicates you might not be passing the data
– mccambridge
Nov 24 '18 at 18:13
1
1
What's going on here? =>
auth((this.state.username, this.state.password)). You're using double parentheses for some reason. Isn't that giving you an error? Try removing one set and see if that makes a difference.– Andy
Nov 24 '18 at 17:39
What's going on here? =>
auth((this.state.username, this.state.password)). You're using double parentheses for some reason. Isn't that giving you an error? Try removing one set and see if that makes a difference.– Andy
Nov 24 '18 at 17:39
What happens when you throw a
console.log('password:', password) right before your fetch call? Make sure you're actually passing the data to the function. The error indicates you might not be passing the data– mccambridge
Nov 24 '18 at 18:13
What happens when you throw a
console.log('password:', password) right before your fetch call? Make sure you're actually passing the data to the function. The error indicates you might not be passing the data– mccambridge
Nov 24 '18 at 18:13
add a comment |
3 Answers
3
active
oldest
votes
0
I think, because of that password or username is null or undefined at that moment. You can check if they are defined and they are strings as below,
body: JSON.stringify({
username: typeof username === 'string' ? username.toString() : '',
password: typeof password === 'string' ? password.toString() : ''
})
and your view should be changed as follow,
onPress={() => auth(this.state.username, this.state.password)}
answered Nov 24 '18 at 18:18
dinindudinindu
2,13211224
add a comment |
0
Delete extra brackets from onPress.
auth(this.state.username, this.state.password)
answered Nov 24 '18 at 18:18
akcobanakcoban
531111
add a comment |
0
Change this
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
to
<TouchableOpacity
style={styles.button}
onPress={() => auth(this.state.username, this.state.password)}
>
Also, whenever you're accessing objects with dot operator (.toString()), it's safe to check if the object is present in the first place.
So it's a good idea to convert this
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
to
body: JSON.stringify({
username: username && username.toString(),
password: password && password.toString()
})
answered Nov 24 '18 at 18:40
Dinesh PandiyanDinesh Pandiyan
2,79811028
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
I think, because of that password or username is null or undefined at that moment. You can check if they are defined and they are strings as below,
body: JSON.stringify({
username: typeof username === 'string' ? username.toString() : '',
password: typeof password === 'string' ? password.toString() : ''
})
and your view should be changed as follow,
onPress={() => auth(this.state.username, this.state.password)}
answered Nov 24 '18 at 18:18
dinindudinindu
2,13211224
add a comment |
0
I think, because of that password or username is null or undefined at that moment. You can check if they are defined and they are strings as below,
body: JSON.stringify({
username: typeof username === 'string' ? username.toString() : '',
password: typeof password === 'string' ? password.toString() : ''
})
and your view should be changed as follow,
onPress={() => auth(this.state.username, this.state.password)}
answered Nov 24 '18 at 18:18
dinindudinindu
2,13211224
add a comment |
0
0
0
I think, because of that password or username is null or undefined at that moment. You can check if they are defined and they are strings as below,
body: JSON.stringify({
username: typeof username === 'string' ? username.toString() : '',
password: typeof password === 'string' ? password.toString() : ''
})
and your view should be changed as follow,
onPress={() => auth(this.state.username, this.state.password)}
answered Nov 24 '18 at 18:18
dinindudinindu
2,13211224
I think, because of that password or username is null or undefined at that moment. You can check if they are defined and they are strings as below,
body: JSON.stringify({
username: typeof username === 'string' ? username.toString() : '',
password: typeof password === 'string' ? password.toString() : ''
})
and your view should be changed as follow,
onPress={() => auth(this.state.username, this.state.password)}
answered Nov 24 '18 at 18:18
dinindudinindu
2,13211224
edited Nov 24 '18 at 18:29
answered Nov 24 '18 at 18:18
dinindudinindu
2,13211224
answered Nov 24 '18 at 18:18
dinindudinindu
2,13211224
answered Nov 24 '18 at 18:18
dinindudinindu
2,13211224
2,13211224
add a comment |
add a comment |
0
Delete extra brackets from onPress.
auth(this.state.username, this.state.password)
answered Nov 24 '18 at 18:18
akcobanakcoban
531111
add a comment |
0
Delete extra brackets from onPress.
auth(this.state.username, this.state.password)
answered Nov 24 '18 at 18:18
akcobanakcoban
531111
add a comment |
0
0
0
Delete extra brackets from onPress.
auth(this.state.username, this.state.password)
answered Nov 24 '18 at 18:18
akcobanakcoban
531111
Delete extra brackets from onPress.
auth(this.state.username, this.state.password)
answered Nov 24 '18 at 18:18
akcobanakcoban
531111
answered Nov 24 '18 at 18:18
akcobanakcoban
531111
answered Nov 24 '18 at 18:18
akcobanakcoban
531111
answered Nov 24 '18 at 18:18
akcobanakcoban
531111
531111
add a comment |
add a comment |
0
Change this
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
to
<TouchableOpacity
style={styles.button}
onPress={() => auth(this.state.username, this.state.password)}
>
Also, whenever you're accessing objects with dot operator (.toString()), it's safe to check if the object is present in the first place.
So it's a good idea to convert this
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
to
body: JSON.stringify({
username: username && username.toString(),
password: password && password.toString()
})
answered Nov 24 '18 at 18:40
Dinesh PandiyanDinesh Pandiyan
2,79811028
add a comment |
0
Change this
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
to
<TouchableOpacity
style={styles.button}
onPress={() => auth(this.state.username, this.state.password)}
>
Also, whenever you're accessing objects with dot operator (.toString()), it's safe to check if the object is present in the first place.
So it's a good idea to convert this
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
to
body: JSON.stringify({
username: username && username.toString(),
password: password && password.toString()
})
answered Nov 24 '18 at 18:40
Dinesh PandiyanDinesh Pandiyan
2,79811028
add a comment |
0
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0
Change this
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
to
<TouchableOpacity
style={styles.button}
onPress={() => auth(this.state.username, this.state.password)}
>
Also, whenever you're accessing objects with dot operator (.toString()), it's safe to check if the object is present in the first place.
So it's a good idea to convert this
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
to
body: JSON.stringify({
username: username && username.toString(),
password: password && password.toString()
})
answered Nov 24 '18 at 18:40
Dinesh PandiyanDinesh Pandiyan
2,79811028
Change this
<TouchableOpacity
style={styles.button}
onPress={() => auth((this.state.username, this.state.password))}
>
to
<TouchableOpacity
style={styles.button}
onPress={() => auth(this.state.username, this.state.password)}
>
Also, whenever you're accessing objects with dot operator (.toString()), it's safe to check if the object is present in the first place.
So it's a good idea to convert this
body: JSON.stringify({
username: username.toString(),
password: password.toString()
})
to
body: JSON.stringify({
username: username && username.toString(),
password: password && password.toString()
})
answered Nov 24 '18 at 18:40
Dinesh PandiyanDinesh Pandiyan
2,79811028
answered Nov 24 '18 at 18:40
Dinesh PandiyanDinesh Pandiyan
2,79811028
answered Nov 24 '18 at 18:40
Dinesh PandiyanDinesh Pandiyan
2,79811028
answered Nov 24 '18 at 18:40
Dinesh PandiyanDinesh Pandiyan
2,79811028
2,79811028
add a comment |
add a comment |
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1
What's going on here? =>
auth((this.state.username, this.state.password)). You're using double parentheses for some reason. Isn't that giving you an error? Try removing one set and see if that makes a difference.– Andy
Nov 24 '18 at 17:39
What happens when you throw a
console.log('password:', password)right before yourfetchcall? Make sure you're actually passing the data to the function. The error indicates you might not be passing the data– mccambridge
Nov 24 '18 at 18:13