Update embedded models in Loopback 4









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I have the following model relationship in my LoopBack 4 application:
A Survey has 1-many relationship with Question,
Question has 1-many relationship with Option.



Am using MongoDB as the database. I am unable to figure out how to implement a PUT/PATCH REST api, that can update the entire Survey model containing the Questions and Options. I get the following exception when i try a PATCH on the sample request JSON below:



Exception:
Unhandled error in PATCH /5be3e00aad0df83d10e580d1: 500 TypeError: Class constructor Question cannot be invoked without 'new'
at Function.DataAccessObject._coerce (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:1799:22)
at doUpdate (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2735:20)
at C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2714:11
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:178:5)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:176:15)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2699:11
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:178:5)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:176:15)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)



Sample PATCH request:
[
"title": "Some survey title 1",
"description": "Some survey title 1",
"questions": [
"options": [
"description": "Some option description 1",
"type": "Option"
],
"description": "Some question description 1"
]
]



Have not been able to find any helpful information on this yet. Any pointers please?



Thanks in advance.






loopbackjs







share|improve this question





















  • I think you have most likely discovered a bug/missing feature of LB4. Can you open a GitHub issue please? github.com/strongloop/loopback-next/issues
    – Miroslav Bajtoš
    Nov 9 at 16:04










  • Thank you for your response Miroslav! Yes, i think i will have to do that.
    – naveenkumashi
    Nov 10 at 8:16














up vote
0
down vote

favorite












I have the following model relationship in my LoopBack 4 application:
A Survey has 1-many relationship with Question,
Question has 1-many relationship with Option.



Am using MongoDB as the database. I am unable to figure out how to implement a PUT/PATCH REST api, that can update the entire Survey model containing the Questions and Options. I get the following exception when i try a PATCH on the sample request JSON below:



Exception:
Unhandled error in PATCH /5be3e00aad0df83d10e580d1: 500 TypeError: Class constructor Question cannot be invoked without 'new'
at Function.DataAccessObject._coerce (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:1799:22)
at doUpdate (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2735:20)
at C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2714:11
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:178:5)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:176:15)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2699:11
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:178:5)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:176:15)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)



Sample PATCH request:
[
"title": "Some survey title 1",
"description": "Some survey title 1",
"questions": [
"options": [
"description": "Some option description 1",
"type": "Option"
],
"description": "Some question description 1"
]
]



Have not been able to find any helpful information on this yet. Any pointers please?



Thanks in advance.






loopbackjs







share|improve this question





















  • I think you have most likely discovered a bug/missing feature of LB4. Can you open a GitHub issue please? github.com/strongloop/loopback-next/issues
    – Miroslav Bajtoš
    Nov 9 at 16:04










  • Thank you for your response Miroslav! Yes, i think i will have to do that.
    – naveenkumashi
    Nov 10 at 8:16












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have the following model relationship in my LoopBack 4 application:
A Survey has 1-many relationship with Question,
Question has 1-many relationship with Option.



Am using MongoDB as the database. I am unable to figure out how to implement a PUT/PATCH REST api, that can update the entire Survey model containing the Questions and Options. I get the following exception when i try a PATCH on the sample request JSON below:



Exception:
Unhandled error in PATCH /5be3e00aad0df83d10e580d1: 500 TypeError: Class constructor Question cannot be invoked without 'new'
at Function.DataAccessObject._coerce (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:1799:22)
at doUpdate (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2735:20)
at C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2714:11
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:178:5)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:176:15)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2699:11
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:178:5)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:176:15)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)



Sample PATCH request:
[
"title": "Some survey title 1",
"description": "Some survey title 1",
"questions": [
"options": [
"description": "Some option description 1",
"type": "Option"
],
"description": "Some question description 1"
]
]



Have not been able to find any helpful information on this yet. Any pointers please?



Thanks in advance.






loopbackjs







share|improve this question













I have the following model relationship in my LoopBack 4 application:
A Survey has 1-many relationship with Question,
Question has 1-many relationship with Option.



Am using MongoDB as the database. I am unable to figure out how to implement a PUT/PATCH REST api, that can update the entire Survey model containing the Questions and Options. I get the following exception when i try a PATCH on the sample request JSON below:



Exception:
Unhandled error in PATCH /5be3e00aad0df83d10e580d1: 500 TypeError: Class constructor Question cannot be invoked without 'new'
at Function.DataAccessObject._coerce (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:1799:22)
at doUpdate (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2735:20)
at C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2714:11
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:178:5)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:176:15)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibdao.js:2699:11
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at doNotify (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:155:49)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:178:5)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)
at Function.ObserverMixin._notifyBaseObservers (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:176:15)
at Function.ObserverMixin.notifyObserversOf (C:UsersnkDocumentsProjectbackendsurveyServicenode_modulesloopback-datasource-jugglerlibobserver.js:153:8)



Sample PATCH request:
[
"title": "Some survey title 1",
"description": "Some survey title 1",
"questions": [
"options": [
"description": "Some option description 1",
"type": "Option"
],
"description": "Some question description 1"
]
]



Have not been able to find any helpful information on this yet. Any pointers please?



Thanks in advance.






loopbackjs




loopbackjs






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 9 at 13:56









naveenkumashi

112




112











  • I think you have most likely discovered a bug/missing feature of LB4. Can you open a GitHub issue please? github.com/strongloop/loopback-next/issues
    – Miroslav Bajtoš
    Nov 9 at 16:04










  • Thank you for your response Miroslav! Yes, i think i will have to do that.
    – naveenkumashi
    Nov 10 at 8:16
















  • I think you have most likely discovered a bug/missing feature of LB4. Can you open a GitHub issue please? github.com/strongloop/loopback-next/issues
    – Miroslav Bajtoš
    Nov 9 at 16:04










  • Thank you for your response Miroslav! Yes, i think i will have to do that.
    – naveenkumashi
    Nov 10 at 8:16















I think you have most likely discovered a bug/missing feature of LB4. Can you open a GitHub issue please? github.com/strongloop/loopback-next/issues
– Miroslav Bajtoš
Nov 9 at 16:04




I think you have most likely discovered a bug/missing feature of LB4. Can you open a GitHub issue please? github.com/strongloop/loopback-next/issues
– Miroslav Bajtoš
Nov 9 at 16:04












Thank you for your response Miroslav! Yes, i think i will have to do that.
– naveenkumashi
Nov 10 at 8:16




Thank you for your response Miroslav! Yes, i think i will have to do that.
– naveenkumashi
Nov 10 at 8:16

















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