Redux state mutation error from action to reducer











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I getting following error when I tried to change the value in control.




Uncaught (in promise) Error: A state mutation was detected between
dispatches, in the path test. This may cause incorrect behavior.




Below is the code





Reducer



export default function testReducer(state = {}, action) {
switch (action.type) {
case types.UPDATE_TEST_SUCCESS:
return {
...state,
test: action.test
};
default:
return state;
}
}




Action



export function saveTest(testData) {
return function(dispatch) {
return testApi.testExam(testData).then(savedData => {
dispatch(updateTestSuccess(savedData));
});
};
}

export function updateTestSuccess(exam) {
return { type: types.UPDATE_Test_SUCCESS, exam };
}




API



static saveTest(testData) {
let url = services.GET_Test_URL;
return fetch(url, {
method: 'PUT',
body: JSON.stringify(testData).toString(),
dataType : "json",
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
}
}).then((response) => response.json())
.then((testD) => Object.assign({}, testD))
.catch((error) => { throw (error); });
}









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  • Probably related to React and Redux: Uncaught Error: A state mutation was detected between dispatches
    – Matheus Reis
    Nov 9 at 2:03

















up vote
0
down vote

favorite












I getting following error when I tried to change the value in control.




Uncaught (in promise) Error: A state mutation was detected between
dispatches, in the path test. This may cause incorrect behavior.




Below is the code





Reducer



export default function testReducer(state = {}, action) {
switch (action.type) {
case types.UPDATE_TEST_SUCCESS:
return {
...state,
test: action.test
};
default:
return state;
}
}




Action



export function saveTest(testData) {
return function(dispatch) {
return testApi.testExam(testData).then(savedData => {
dispatch(updateTestSuccess(savedData));
});
};
}

export function updateTestSuccess(exam) {
return { type: types.UPDATE_Test_SUCCESS, exam };
}




API



static saveTest(testData) {
let url = services.GET_Test_URL;
return fetch(url, {
method: 'PUT',
body: JSON.stringify(testData).toString(),
dataType : "json",
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
}
}).then((response) => response.json())
.then((testD) => Object.assign({}, testD))
.catch((error) => { throw (error); });
}









share|improve this question
























  • Probably related to React and Redux: Uncaught Error: A state mutation was detected between dispatches
    – Matheus Reis
    Nov 9 at 2:03















up vote
0
down vote

favorite









up vote
0
down vote

favorite











I getting following error when I tried to change the value in control.




Uncaught (in promise) Error: A state mutation was detected between
dispatches, in the path test. This may cause incorrect behavior.




Below is the code





Reducer



export default function testReducer(state = {}, action) {
switch (action.type) {
case types.UPDATE_TEST_SUCCESS:
return {
...state,
test: action.test
};
default:
return state;
}
}




Action



export function saveTest(testData) {
return function(dispatch) {
return testApi.testExam(testData).then(savedData => {
dispatch(updateTestSuccess(savedData));
});
};
}

export function updateTestSuccess(exam) {
return { type: types.UPDATE_Test_SUCCESS, exam };
}




API



static saveTest(testData) {
let url = services.GET_Test_URL;
return fetch(url, {
method: 'PUT',
body: JSON.stringify(testData).toString(),
dataType : "json",
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
}
}).then((response) => response.json())
.then((testD) => Object.assign({}, testD))
.catch((error) => { throw (error); });
}









share|improve this question















I getting following error when I tried to change the value in control.




Uncaught (in promise) Error: A state mutation was detected between
dispatches, in the path test. This may cause incorrect behavior.




Below is the code





Reducer



export default function testReducer(state = {}, action) {
switch (action.type) {
case types.UPDATE_TEST_SUCCESS:
return {
...state,
test: action.test
};
default:
return state;
}
}




Action



export function saveTest(testData) {
return function(dispatch) {
return testApi.testExam(testData).then(savedData => {
dispatch(updateTestSuccess(savedData));
});
};
}

export function updateTestSuccess(exam) {
return { type: types.UPDATE_Test_SUCCESS, exam };
}




API



static saveTest(testData) {
let url = services.GET_Test_URL;
return fetch(url, {
method: 'PUT',
body: JSON.stringify(testData).toString(),
dataType : "json",
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
}
}).then((response) => response.json())
.then((testD) => Object.assign({}, testD))
.catch((error) => { throw (error); });
}






reactjs redux react-redux






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edited Nov 9 at 1:58

























asked Nov 9 at 0:05









Parag Pathari

5118




5118












  • Probably related to React and Redux: Uncaught Error: A state mutation was detected between dispatches
    – Matheus Reis
    Nov 9 at 2:03




















  • Probably related to React and Redux: Uncaught Error: A state mutation was detected between dispatches
    – Matheus Reis
    Nov 9 at 2:03


















Probably related to React and Redux: Uncaught Error: A state mutation was detected between dispatches
– Matheus Reis
Nov 9 at 2:03






Probably related to React and Redux: Uncaught Error: A state mutation was detected between dispatches
– Matheus Reis
Nov 9 at 2:03



















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