I can fill a picker using json stocked in state
produits: [{
"code": 11,
"pu": 50,
"ps": 50,
"des": "P 1",
"promo": "1",
}, {
"code": 22,
"pu": 100,
"ps": 100,
"des": "P 2",
"promo": "1",
}, {
"code": 33,
"pu": 80,
"ps": 80,
"des": "P 3",
"promo": "0",
},
{
"code": 44,
"pu": 120,
"ps": 120,
"des": "P 4",
"promo": "1",
},
],
what I want is the same thing but if produits.promo === '1' this item will be shown else it will not be shown, this is my approach but it have an empty picker: whene I click nothing changes :
{<Picker
style={Styles.picker}
selectedValue={this.state.pu}
onValueChange={(itemValue, itemIndex) => this.setState({pu: itemValue, codeProduit: itemIndex+1,})} >
{ this.state.produits.map((item, key)=>
{if (item.promo === "0") {
<Picker.Item label={item.des} value={item.pu} key={item.code} />
}
}
)}
</Picker>}
PS. it works good without If
block:
<Picker.Item label={item.des} value={item.pu} key={item.code} />
what's wrong with my approach ?
Just make a new produits array using the filter
render() {
const promoProduits = this.state.produits.filter(item => item.promo === '1');
....
Then render like
{<Picker
style={Styles.picker}
selectedValue={this.state.pu}
onValueChange={(itemValue, itemIndex) => this.setState({pu: itemValue, codeProduit: itemIndex+1,})} >
{
promoProduits.map((item, key)=> (<Picker.Item label={item.des} value={item.pu} key={item.code} />)
}
</Picker>}