Mixing
IF in Redux Observable epic
I have an epic that catch each dispatch of getting status (just item from state, like state.process:{ status: fail, success, inWork}, not an request status like 200, 500 etc).
When status == success (by getting status from state) i need to dispatch another action like SET_STATUS_SUCCESS
const getStatus = (action, state) =>
action.pipe(
ofType(GET_STATUS),
withLatestFrom(state),
mergeMap(([action, state]) => {
const { status } = state.api.process; //here is what i need, there is no problem with status.
if (status === "success") {
return mapTo(SET_STATUS_SUCCESS) //got nothing and error.
}
})
);
Now i receive error:
Uncaught TypeError: You provided 'function (source) { return
source.lift(new MapToOperator(value)); }' where a stream was expected.
You can provide an Observable, Promise, Array, or Iterable.
at subscribeTo (subscribeTo.js:41)
What should i do? I tried just return setStatusSuccess action but it doesn't work too.
rxjs observable redux-observable
asked Nov 19 '18 at 12:22
Alex Straza
445
add a comment |
I have an epic that catch each dispatch of getting status (just item from state, like state.process:{ status: fail, success, inWork}, not an request status like 200, 500 etc).
When status == success (by getting status from state) i need to dispatch another action like SET_STATUS_SUCCESS
const getStatus = (action, state) =>
action.pipe(
ofType(GET_STATUS),
withLatestFrom(state),
mergeMap(([action, state]) => {
const { status } = state.api.process; //here is what i need, there is no problem with status.
if (status === "success") {
return mapTo(SET_STATUS_SUCCESS) //got nothing and error.
}
})
);
Now i receive error:
Uncaught TypeError: You provided 'function (source) { return
source.lift(new MapToOperator(value)); }' where a stream was expected.
You can provide an Observable, Promise, Array, or Iterable.
at subscribeTo (subscribeTo.js:41)
What should i do? I tried just return setStatusSuccess action but it doesn't work too.
rxjs observable redux-observable
asked Nov 19 '18 at 12:22
Alex Straza
445
add a comment |
I have an epic that catch each dispatch of getting status (just item from state, like state.process:{ status: fail, success, inWork}, not an request status like 200, 500 etc).
When status == success (by getting status from state) i need to dispatch another action like SET_STATUS_SUCCESS
const getStatus = (action, state) =>
action.pipe(
ofType(GET_STATUS),
withLatestFrom(state),
mergeMap(([action, state]) => {
const { status } = state.api.process; //here is what i need, there is no problem with status.
if (status === "success") {
return mapTo(SET_STATUS_SUCCESS) //got nothing and error.
}
})
);
Now i receive error:
Uncaught TypeError: You provided 'function (source) { return
source.lift(new MapToOperator(value)); }' where a stream was expected.
You can provide an Observable, Promise, Array, or Iterable.
at subscribeTo (subscribeTo.js:41)
What should i do? I tried just return setStatusSuccess action but it doesn't work too.
rxjs observable redux-observable
asked Nov 19 '18 at 12:22
Alex Straza
445
I have an epic that catch each dispatch of getting status (just item from state, like state.process:{ status: fail, success, inWork}, not an request status like 200, 500 etc).
When status == success (by getting status from state) i need to dispatch another action like SET_STATUS_SUCCESS
const getStatus = (action, state) =>
action.pipe(
ofType(GET_STATUS),
withLatestFrom(state),
mergeMap(([action, state]) => {
const { status } = state.api.process; //here is what i need, there is no problem with status.
if (status === "success") {
return mapTo(SET_STATUS_SUCCESS) //got nothing and error.
}
})
);
Now i receive error:
Uncaught TypeError: You provided 'function (source) { return
source.lift(new MapToOperator(value)); }' where a stream was expected.
You can provide an Observable, Promise, Array, or Iterable.
at subscribeTo (subscribeTo.js:41)
What should i do? I tried just return setStatusSuccess action but it doesn't work too.
rxjs observable redux-observable
rxjs observable redux-observable
asked Nov 19 '18 at 12:22
Alex Straza
445
asked Nov 19 '18 at 12:22
Alex Straza
445
edited Nov 19 '18 at 12:33
asked Nov 19 '18 at 12:22
Alex Straza
445
asked Nov 19 '18 at 12:22
Alex Straza
445
asked Nov 19 '18 at 12:22
Alex Straza
445
445
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You need to return an observable from the function you pass to mergeMap. Try this:
const getStatus = (action, state) =>
action.pipe(
ofType(GET_STATUS),
withLatestFrom(state),
mergeMap(([action, state]) => {
const { status } = state.api.process;
if (status === 'success') {
return of({ type: SET_STATUS_SUCCESS });
} else {
return EMPTY;
}
}),
);
of and EMPTY are imported from rxjs.
answered Nov 19 '18 at 12:35
mpontus
9352617
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53374557%2fif-in-redux-observable-epic%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You need to return an observable from the function you pass to mergeMap. Try this:
const getStatus = (action, state) =>
action.pipe(
ofType(GET_STATUS),
withLatestFrom(state),
mergeMap(([action, state]) => {
const { status } = state.api.process;
if (status === 'success') {
return of({ type: SET_STATUS_SUCCESS });
} else {
return EMPTY;
}
}),
);
of and EMPTY are imported from rxjs.
answered Nov 19 '18 at 12:35
mpontus
9352617
add a comment |
You need to return an observable from the function you pass to mergeMap. Try this:
const getStatus = (action, state) =>
action.pipe(
ofType(GET_STATUS),
withLatestFrom(state),
mergeMap(([action, state]) => {
const { status } = state.api.process;
if (status === 'success') {
return of({ type: SET_STATUS_SUCCESS });
} else {
return EMPTY;
}
}),
);
of and EMPTY are imported from rxjs.
answered Nov 19 '18 at 12:35
mpontus
9352617
add a comment |
You need to return an observable from the function you pass to mergeMap. Try this:
const getStatus = (action, state) =>
action.pipe(
ofType(GET_STATUS),
withLatestFrom(state),
mergeMap(([action, state]) => {
const { status } = state.api.process;
if (status === 'success') {
return of({ type: SET_STATUS_SUCCESS });
} else {
return EMPTY;
}
}),
);
of and EMPTY are imported from rxjs.
answered Nov 19 '18 at 12:35
mpontus
9352617
You need to return an observable from the function you pass to mergeMap. Try this:
const getStatus = (action, state) =>
action.pipe(
ofType(GET_STATUS),
withLatestFrom(state),
mergeMap(([action, state]) => {
const { status } = state.api.process;
if (status === 'success') {
return of({ type: SET_STATUS_SUCCESS });
} else {
return EMPTY;
}
}),
);
of and EMPTY are imported from rxjs.
answered Nov 19 '18 at 12:35
mpontus
9352617
answered Nov 19 '18 at 12:35
mpontus
9352617
answered Nov 19 '18 at 12:35
mpontus
9352617
answered Nov 19 '18 at 12:35
mpontus
9352617
9352617
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53374557%2fif-in-redux-observable-epic%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
