Rendering a nested object state - reactjs

Question

This problem is giving me a huge headache so any help is welcome :)
In this component, I'm making 2 axios calls to different APIs: one for freegeoip and one for openweathermap. I'm storing the data in the currentCity state, which is an object with 2 keys, location and weather. The idea is that the app detects your current location (using freegeoip) and renders location name and weather data (using openweathermap).
I'm positive it's storing the state properly as console logs have confirmed. I can render the location data for currentCity state, but can't seem to render the weather data for currentCity state.
renderCurrentCity(city) {
console.log('state3:', this.state.currentCity);
console.log([city.weather.main]);
return(
<div>
<li>{city.location.city}, {city.location.country_name}</li> // Working
<li>{city.weather.main.temp}</li> // Not working
</div>
)
}
The console error I get:
Uncaught (in promise) TypeError: Cannot read property '_currentElement' of null
currentCity.location JSON:
{
"ip": // hidden,
"country_code": "FR",
"country_name": "France",
"region_code": "GES",
"region_name": "Grand-Est",
"city": "Reims",
"zip_code": "",
"time_zone": "Europe/Paris",
"latitude": 49.25,
"longitude": 4.0333,
"metro_code": 0
}
currentCity.weather JSON:
{
"coord": {
"lon": 4.03,
"lat": 49.25
},
"weather": [
{
"id": 800,
"main": "Clear",
"description": "clear sky",
"icon": "01d"
}
],
"base": "stations",
"main": {
"temp": 283.15,
"pressure": 1011,
"humidity": 43,
"temp_min": 283.15,
"temp_max": 283.15
},
"visibility": 10000,
"wind": {
"speed": 3.1,
"deg": 350
},
"clouds": {
"all": 0
},
"dt": 1493127000,
"sys": {
"type": 1,
"id": 5604,
"message": 0.1534,
"country": "FR",
"sunrise": 1493094714,
"sunset": 1493146351
},
"id": 2984114,
"name": "Reims",
"cod": 200
}
Rest of code:
import React, { Component } from 'react';
import axios from 'axios';
import WeatherList from './weatherlist';
import SearchBar from './searchbar';
const API_KEY = '95108d63b7f0cf597d80c6d17c8010e0';
const ROOT_URL = 'http://api.openweathermap.org/data/2.5/weather?'
export default class App extends Component {
constructor(props) {
super(props);
this.state = {
cities: [],
errors: '',
currentCity: {
location: {},
weather: {}
}
};
this.currentCity();
this.renderCurrentCity = this.renderCurrentCity.bind(this);
}
citySearch(city) {
const url = `${ROOT_URL}&appid=${API_KEY}&q=${city}`;
axios.get(url)
.then(response => {
const citiesArr = this.state.cities.slice();
this.setState({
cities: [response.data, ...citiesArr],
errors: null
});
})
.catch(error => {
this.setState({
errors: 'City not found'
})
})
}
currentCity() {
var city;
var country;
axios.get('http://freegeoip.net/json/')
.then(response => {
const lat = response.data.latitude;
const lon = response.data.longitude;
city = response.data.city;
country = response.data.country_name;
const url = `${ROOT_URL}&appid=${API_KEY}&lat=${lat}&lon=${lon}`;
const state = this.state.currentCity;
console.log('state1:',state);
this.setState({
currentCity: { ...state, location: response.data }
});
console.log(url);
axios.get(url)
.then(city => {
const state = this.state.currentCity;
console.log('state2:', state);
this.setState({
currentCity: { ...state, weather: city.data }
});
})
})
}
renderCurrentCity(city) {
console.log('state3:', this.state.currentCity);
console.log([city.weather.main]);
return(
<div>
<li>{city.location.city}, {city.location.country_name}</li>
<li>{city.weather.main.temp}</li>
</div>
)
}
render() {
return (
<div className={this.state.cities == false ? 'search': 'search-up'}>
<h1>What's the weather today?</h1>
<ul className='list-unstyled text-center'>
{this.renderCurrentCity(this.state.currentCity)}
</ul>
<SearchBar
onSearchSubmit={this.citySearch.bind(this)}
errors={this.state.errors} />
{this.state.cities == false ? null : <WeatherList cities={this.state.cities} />}
</div>
)
}
}

Answer 1

You are spreading your whole state when your receive the weather data:
this.setState({
currentCity: { ...state, weather: city.data }
});
it should be:
this.setState({
currentCity: { ...state.currentCity, weather: city.data }
});