How do Functions work in a Mongoose Schema? - mongodb

Question

I have a schema where I'm trying to generate a nanoid to show on the front end. (The default MongoDB ObjectID is too long to display to users.)
What I've done is to insert it into my schema as a default value that generates a new string each time an instance of the model is created.
These are the instructions provided by the nanoid docs for dealing with Mongoose
const mySchema = new Schema({
_id: {
type: String,
default: () => nanoid()
}
})
I've replicated this in my code:
const MySchema = new Schema(
{
// a bunch of other properties
nano_id: {
type: String,
default: () => nanoid()
}
},
{ autoIndex: true },
)
The problem I've run into is that for whatever reason. When I use my UI to create a new model with this new code on the back end, after hitting the submit button, the state changes to loading and gets stuck there.
I found a little hack where I can save my code in VSCode which forces a hot reload. This breaks out of the loading stage where I can then resubmit and it works as expected - nanoid is generated, displayed every where I want it, etc.
When my new nano_id property is removed from the Schema, I don't have to do this reloading hack to get it to save. So I know the bug has something to do with this.
What is actually happening with the syntax default: () => nanoid()?
My hypothesis is that there is some promise that is being generated or something that isn't resolving properly. Can't seem to find anything about this in the docs though. Other than related specifically to Date and Date.now, which I'm already using and is working fine.
Edit: adding function code
// at top of file where Schema is defined
const { customAlphabet } = require('nanoid');
const alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
const nanoid = customAlphabet(alphabet, 8);
Edit: adding request handler
router.post("/create", async (req, res) => {
const payload = req.body
// Map request payload to Referral Model
const new_referral = new Referral({
referral_status: payload.referral_status,
referral_agency: payload.referral_agency,
date_assigned: payload.date_assigned,
referral_source: payload.referral_source,
referral_source_email: payload.referral_source_email,
referral_source_name: payload.referral_source_name,
referral_title: payload.referral_title,
referral_source_phone: payload.referral_source_phone,
referral_need: payload.referral_need || [],
additional_details: payload.additional_details,
dob: payload.dob,
last_name: payload.last_name,
first_name: payload.first_name,
middle_name: payload.middle_name,
gender: payload.gender,
language: payload.language,
address_1: payload.address_1,
address_2: payload.address_2,
city: payload.city,
state: payload.state,
county: payload.county,
zip: payload.zip,
mailing_address_1: payload.mailing_address_1,
mailing_address_2: payload.mailing_address_2,
mailing_city: payload.mailing_city,
mailing_state: payload.mailing_state,
mailing_zip: payload.mailing_zip,
phone: payload.phone,
primary_phone_valid: payload.primary_phone_valid,
phone_secondary: payload.phone_secondary,
secondary_phone_valid: payload.secondary_phone_valid,
leave_message: payload.leave_message,
insurance_1: payload.insurance_1,
insurance_1_plan: payload.insurance_1_plan,
insurance_1_group_number: payload.insurance_1_group_number,
insurance_1_policy_number: payload.insurance_1_policy_number,
insurance_2: payload.insurance_2,
insurance_2_plan: payload.insurance_2_plan,
insurance_2_group_number: payload.insurance_2_group_number,
insurance_2_policy_number: payload.insurance_2_policy_number,
insurance_3: payload.insurance_3,
insurance_3_plan: payload.insurance_3_plan,
insurance_3_group_number: payload.insurance_3_group_number,
insurance_3_policy_number: payload.insurance_3_policy_number,
appointment_availability: payload.appointment_availability,
preferred_times: payload.preferred_times,
appointment_date: payload.appointment_date,
appointment_time: payload.appointment_time,
assessment_harp: payload.assessment_harp,
assessment_contact_date: payload.assessment_contact_date,
assessment_date_completed: payload.assessment_date_completed,
assessment_date_submitted: payload.assessment_date_submitted,
assessment_date_approved: payload.assessment_date_approved,
cin: payload.cin,
number_cancelled: payload.number_cancelled,
number_noshows: payload.number_noshows,
date_received: payload.date_received,
history: payload.history,
consent: payload.consent,
consent_date: payload.date_received,
project: payload.project || null,
contact_needs: payload.contact_needs || [],
contact_type: payload.contact_type || [],
notes: payload.notes,
contact_details: payload.contact_details,
contact_date: payload.contact_date,
contact_time: payload.contact_time,
number_of_contacts: payload.number_of_contacts,
address_type: payload.address_type,
shelter_name: payload.shelter_name,
address_valid: payload.address_valid,
agency_therapist: payload.agency_therapist,
phone_agency_therapist: payload.phone_agency_therapist,
email_agency_therapist: payload.email_agency_therapist,
agency_prescribing_clinician: payload.agency_prescribing_clinician,
phone_agency_prescribing_clinician:
payload.phone_agency_prescribing_clinician,
email_agency_prescribing_clinician:
payload.email_agency_prescribing_clinician,
primary_care_provider: payload.primary_care_provider,
phone_primary_care_provider: payload.phone_primary_care_provider,
email_primary_care_provider: payload.email_primary_care_provider,
email_client: payload.email_client,
referral_encounter_note: payload.referral_encounter_note,
health_home_enrolled: payload.health_home_enrolled,
health_home_facility: payload.health_home_facility,
health_home_enrollment_date: payload.health_home_enrollment_date,
care_management_enrolled: payload.care_management_enrolled,
care_management_facility: payload.care_management_facility,
care_management_enrollment_date: payload.care_management_enrollment_date,
last_annual_physical_date: payload.last_annual_physical_date,
last_pcp_followup_date: payload.last_pcp_followup_date,
last_annual_physical_time: payload.last_annual_physical_time,
last_pcp_followup_time: payload.last_pcp_followup_time,
insurance_1_effective_date: payload.insurance_1_effective_date,
insurance_1_expiration_date: payload.insurance_1_expiration_date,
insurance_2_effective_date: payload.insurance_2_effective_date,
insurance_2_expiration_date: payload.insurance_2_expiration_date,
insurance_3_effective_date: payload.insurance_3_effective_date,
insurance_3_expiration_date: payload.insurance_3_expiration_date,
qm_1_checkbox: payload.qm_1_checkbox,
qm_1_date: payload.qm_1_date,
qm_2_checkbox: payload.qm_2_checkbox,
qm_2_date: payload.qm_2_date,
qm_3_checkbox: payload.qm_3_checkbox,
qm_3_date: payload.qm_3_date,
qm_4_checkbox: payload.qm_4_checkbox,
qm_4_date: payload.qm_4_date,
qm_5_checkbox: payload.qm_5_checkbox,
qm_5_date: payload.qm_5_date,
qm_6_checkbox: payload.qm_6_checkbox,
qm_6_date: payload.qm_6_date,
is_guardian: payload.is_guardian,
guardian_first_name: payload.guardian_first_name,
guardian_last_name: payload.guardian_last_name,
engagement_contact_type: payload.engagement_contact_type,
engagement_date: payload.engagement_date,
engagement_time: payload.engagement_time,
engagement_number_of_contacts: payload.engagement_number_of_contacts,
engagement_contact_details: payload.engagement_contact_details,
active_duty: payload.active_duty,
veteran: payload.veteran,
programs: payload.programs,
outcomes: payload.outcomes,
user_access: payload.user_access,
ethnicity: payload.ethnicity,
quality_metrics: payload.quality_metrics,
hospital_site_address: payload.hospital_site_address,
hospital_site_name: payload.hospital_site_name,
hospital_site_npi: payload.hospital_site_npi,
hospital_site_phone: payload.hospital_site_phone,
pcp_site_name: payload.pcp_site_name,
pcp_name: payload.pcp_name,
pcp_npi: payload.pcp_npi,
pcp_phone: payload.pcp_phone,
pcp_address: payload.pcp_address,
care_management: {
contact_needs: payload.care_management_contact_needs,
contact_type: payload.care_management_contact_type,
number_of_contacts: payload.care_management_number_of_contacts,
appointment_date: payload.care_management_appointment_date,
appointment_time: payload.care_management_appointment_time,
contact_date: payload.care_management_contact_date,
contact_time: payload.care_management_contact_time,
contact_details: payload.care_management_contact_details,
contact_duration: payload.care_management_contact_duration,
number_of_contacts: payload.care_management_number_of_contacts,
},
peer_services: {
outcome_of_intervention: payload.peer_services_outcome_of_intervention,
contact_needs: payload.peer_services_contact_needs,
contact_type: payload.peer_services_contact_type,
number_of_contacts: payload.peer_services_number_of_contacts,
appointment_date: payload.peer_services_appointment_date,
appointment_time: payload.peer_services_appointment_time,
contact_date: payload.peer_services_contact_date,
contact_time: payload.peer_services_contact_time,
contact_details: payload.peer_services_contact_details,
contact_duration: payload.peer_services_contact_duration,
number_of_contacts: payload.peer_services_number_of_contacts,
},
physical_health: {
contact_needs: payload.physical_health_contact_needs,
contact_type: payload.physical_health_contact_type,
number_of_contacts: payload.physical_health_number_of_contacts,
contact_date: payload.physical_health_contact_date,
contact_time: payload.physical_health_contact_time,
contact_details: payload.physical_health_contact_details,
contact_duration: payload.physical_health_contact_duration,
number_of_contacts: payload.physical_health_number_of_contacts,
hospital_site_address: payload.physical_health_hospital_site_address,
hospital_site_name: payload.physical_health_hospital_site_name,
hospital_site_npi: payload.physical_health_hospital_site_npi,
hospital_site_phone: payload.physical_health_hospital_site_phone,
pcp_site_name: payload.physical_health_pcp_site_name,
pcp_name: payload.physical_health_pcp_name,
pcp_npi: payload.physical_health_pcp_npi,
pcp_phone: payload.physical_health_pcp_phone,
pcp_address: payload.physical_health_pcp_address,
pcp_appointment_date: payload.physical_health_pcp_appointment_date,
pcp_appointment_time: payload.physical_health_pcp_appointment_time,
last_pcp_followup_date: payload.physical_health_last_pcp_followup_date,
last_pcp_followup_time: payload.physical_health_last_pcp_followup_time,
last_annual_physical_date:
payload.physical_health_last_annual_physical_date,
last_annual_physical_time:
payload.physical_health_last_annual_physical_time,
breast_cancer_screening: payload.breast_cancer_screening,
breast_cancer_screening_date: payload.breast_cancer_screening_date,
well_child_visit_3_18: payload.well_child_visit_3_18,
well_child_visit_3_18_date: payload.well_child_visit_3_18_date,
well_child_first_30: payload.well_child_first_30,
well_child_first_30_date: payload.well_child_first_30_date,
seven_day_hospital_follow_up: payload.seven_day_hospital_follow_up,
seven_day_hospital_follow_up_date:
payload.seven_day_hospital_follow_up_date,
thirty_day_hospital_follow_up: payload.thirty_day_hospital_follow_up,
thirty_day_hospital_follow_up_date:
payload.thirty_day_hospital_follow_up_date,
emergency_dept_follow_up: payload.emergency_dept_follow_up,
emergency_dept_follow_up_date: payload.emergency_dept_follow_up_date,
diabetes_screening_schizo_bipolar:
payload.diabetes_screening_schizo_bipolar,
diabetes_screening_schizo_bipolar_date:
payload.diabetes_screening_schizo_bipolar_date,
potential_avoidable_ed_utilization:
payload.potential_avoidable_ed_utilization,
potential_avoidable_ed_utilization_date:
payload.potential_avoidable_ed_utilization_date,
cervical_cancer_screening: payload.cervical_cancer_screening,
cervical_cancer_screening_date: payload.cervical_cancer_screening_date,
csc_eye: payload.csc_eye,
csc_eye_date: payload.csc_eye_date,
amr: payload.amr,
amr_date: payload.amr_date,
col: payload.col,
col_date: payload.col_date,
},
outpatient_mental_health: {
contact_needs: payload.outpatient_mental_contact_needs,
contact_type: payload.outpatient_mental_contact_type,
number_of_contacts: payload.outpatient_mental_number_of_contacts,
appointment_date: payload.outpatient_mental_appointment_date,
appointment_time: payload.outpatient_mental_appointment_time,
contact_date: payload.outpatient_mental_contact_date,
contact_time: payload.outpatient_mental_contact_time,
contact_details: payload.outpatient_mental_contact_details,
contact_duration: payload.outpatient_mental_contact_duration,
number_of_contacts: payload.outpatient_mental_number_of_contacts,
type_of_appointment: payload.outpatient_mental_type_of_appointment,
diagnosis: payload.outpatient_mental_diagnosis,
grpa: payload.outpatient_mental_grpa,
grpa_date_completed: payload.outpatient_mental_grpa_date_completed,
grpa_frequency: payload.outpatient_mental_grpa_frequency,
noms: payload.outpatient_mental_noms,
noms_date_completed: payload.outpatient_mental_noms_date_completed,
noms_frequency: payload.outpatient_mental_noms_frequency,
},
outpatient_substance_use: {
contact_needs: payload.outpatient_substance_contact_needs,
contact_type: payload.outpatient_substance_contact_type,
number_of_contacts: payload.outpatient_substance_number_of_contacts,
appointment_date: payload.outpatient_substance_appointment_date,
appointment_time: payload.outpatient_substance_appointment_time,
contact_date: payload.outpatient_substance_contact_date,
contact_time: payload.outpatient_substance_contact_time,
contact_details: payload.outpatient_substance_contact_details,
contact_duration: payload.outpatient_substance_contact_duration,
number_of_contacts: payload.outpatient_substance_number_of_contacts,
type_of_appointment: payload.outpatient_substance_type_of_appointment,
diagnosis: payload.outpatient_substance_diagnosis,
grpa: payload.outpatient_substance_grpa,
grpa_date_completed: payload.outpatient_substance_grpa_date_completed,
grpa_frequency: payload.outpatient_mental_grpa_frequency,
noms: payload.outpatient_substance_noms,
noms_date_completed: payload.outpatient_substance_noms_date_completed,
noms_frequency: payload.outpatient_mental_noms_frequency,
},
})
if (!payload.duplicate_skip) {
// Check if there is already a referral with same first name, last name and dob. If so return an error
await Referral.find(
{
$and: [
{
last_name: {
$regex: new RegExp(`^${payload.last_name}$`, "i"),
},
first_name: {
$regex: new RegExp(`^${payload.first_name}$`, "i"),
},
dob: {
$regex: new RegExp(`^${payload.dob}$`, "i"),
},
project: {
$regex: new RegExp(`^${payload.project}$`, "i"),
},
},
],
},
(err, response) => {
if (response.length !== 0) {
var message = {
message:
"Referral with the same First Name, Last Name and Date of Birth already exists.",
type: "duplicate",
}
duplicate = true
return res.status(400).json(message)
}
},
)
} else {
new_referral
.save()
.then((referral) => {
// If an agency adds a referral with 'Agency' field blank / None, send CBHS email that new referral was added
if (
referral.referral_agency === "None" ||
referral.referral_agency === "CBHS" ||
referral.referral_agency === ""
) {
const send_to = "CBHS"
updateAgencyNotification(send_to, referral.project[0])
}
return res.status(200).json(referral)
})
.catch((err) => {
// Validation error, missing keys on required fields for referral creation
logger.error(req.originalUrl + err)
if (err.name === "ValidationError") {
missing_keys = []
for (err in err.errors) {
switch (err) {
case "referral_source":
missing_keys.push("Referral Source")
break
case "referral_source_email":
missing_keys.push("Referral Source Email")
break
case "referral_need":
missing_keys.push("Referral Need")
break
case "last_name":
missing_keys.push("Last Name")
break
case "first_name":
missing_keys.push("First Name")
break
case "middle_name":
missing_keys.push("Middle Name")
break
case "gender":
missing_keys.push("Gender")
break
case "address_1":
missing_keys.push("Address 1")
break
case "county":
missing_keys.push("County")
break
case "zip":
missing_keys.push("Zipcode")
break
case "phone":
missing_keys.push("Phone Number")
break
}
}
const validationError = {
message: "Validation Error",
fields: missing_keys,
}
return res.status(400).json(validationError)
}
})
}
})

Answer 1

problem here was there was no logic to save when duplicate skip was false.
if (!payload.duplicate_skip)
so it looked for something with the same first, last and dob,
await Referral.find(
{
$and: [
{
last_name: {
$regex: new RegExp(`^${payload.last_name}$`, "i"),
},
first_name: {
$regex: new RegExp(`^${payload.first_name}$`, "i"),
},
dob: {
$regex: new RegExp(`^${payload.dob}$`, "i"),
},
project: {
$regex: new RegExp(`^${payload.project}$`, "i"),
},
},
],
}
and if there was no match, it just did nothing.
the logic to save
else {
new_referral
.save()
.then((referral) => {
// If an agency adds a referral with 'Agency' field blank / None, send CBHS email that new referral was added
if (
referral.referral_agency === "None" ||
referral.referral_agency === "CBHS" ||
referral.referral_agency === ""
) {
const send_to = "CBHS"
updateAgencyNotification(send_to, referral.project[0])
}
return res.status(200).json(referral)
})
.catch((err) => {
// Validation error, missing keys on required fields for referral creation
logger.error(req.originalUrl + err)
if (err.name === "ValidationError") {
missing_keys = []
for (err in err.errors) {
switch (err) {
case "referral_source":
missing_keys.push("Referral Source")
break
case "referral_source_email":
missing_keys.push("Referral Source Email")
break
case "referral_need":
missing_keys.push("Referral Need")
break
case "last_name":
missing_keys.push("Last Name")
break
case "first_name":
missing_keys.push("First Name")
break
case "middle_name":
missing_keys.push("Middle Name")
break
case "gender":
missing_keys.push("Gender")
break
case "address_1":
missing_keys.push("Address 1")
break
case "county":
missing_keys.push("County")
break
case "zip":
missing_keys.push("Zipcode")
break
case "phone":
missing_keys.push("Phone Number")
break
}
}
const validationError = {
message: "Validation Error",
fields: missing_keys,
}
return res.status(400).json(validationError)
}
})
}
was never triggered when skip was false
so i added it after
if (response.length !== 0) {
var message = {
message:
"Referral with the same First Name, Last Name and Date of Birth already exists.",
type: "duplicate",
}
duplicate = true
return res.status(400).json(message)
}
meaning, "after checking for a duplicate (skip is false), if you don't get anything back (response === 0), then go ahead and actually create and save a new instance of the model"