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Visualizaçõesstudentslearn.map() is not a function
I tried mapping data with react from an array nested in a firestore collection but I get an error:
array.map() is not a function.
This is how I tried tried mapping from the the collection, where courseinfo is the state storing returned data from firebase
{courseinfo.students_learn.map((students)=>{
return(<CourseLearnItem>{students}</CourseLearnItem>)
})}
This is the structure of the collection I'm trying to get data from the students_learn field
·
Juan Pablo Isaza
2 Respostas
Responde à pergunta0
I believe that you should parse the courseinfo.students_learn first because from what I saw it is a string.
const studentList = JSON.parse(courseinfo.students_learn);
return (
<div>
{studentList.map((student) => (
<CourseLearnItem>{student}</CourseLearnItem>
))}
<div/>
);
·
Juan Pablo Isaza
Relatório
0
Based on your screenshot, students_learn is a string and map is a function for arrays.Since you are trying to apply array function to String it throws an error.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map
·
Juan Pablo Isaza
Relatório
Responde à pergunta