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Is there a way to send function context to model in nodejs mongoose?

How is Node.js inherently faster when it still relies on Threads internally?Is there a way to get version from package.json in nodejs code?Binding Mongoose models save method inside async.auto (NodeJs)Express cookieSession and Mongoose: how can I make request.session.user be a Mongoose model?Accessing Express.js request context in Mongoose modelsMongoose dynamic models, cannot use populate()Best practice to handle errors in Mongoose's post hooksMongoose pass req object to middlewareHow to access one model Schema in another model mongoose databaseGet model count in Mongoose pre hooks

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0

I need to implement pre hooks in mongoose that are based on the id of the user that does the request.

I can't access the initial function context (userId, permissions, etc) and use it in mongoose pre hooks.

let writePermissionCondition = async function(next) 
 let ctx = getCurrentContext();
 next();

As I can't send the current context in the mongoose model, I can't access the userId that does the actual request.

Edit: a little more info on the architecture and what I'm trying to achieve

1) The user makes a request to the service (listening to events. ex: user/create, user/delete, user/find, etc)

2) The event calls a CRUD function

3) The Model used in the CRUD has ReadPermission and WritePermission middlewares (hooks)

4) The ReadPermission and WritePermission verifies the user that makes the request if, in fact, has permissions to read or write. This is the step where I need to know what user tried to access that Model.

I might be wrong, and the permissions should be implemented in the controller and not in the model.

node.js mongoose

share|improve this question

edited Mar 25 at 20:22

ktln2003

asked Mar 25 at 6:53

ktln2003ktln2003

12

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  could you add a sample code of your getCurrentContext() implementation? This will be helpful in order to have a good answer for your problem.
  
  – lifeisfoo
  Mar 25 at 12:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  you initial question was about a mongoose problem "I can't access the initial function context (userId, permissions, etc) and use it in mongoose pre hooks" and two answers were given. After you edit, this question has become about a suggested architecture: "a little more info on the architecture and what I'm trying to achieve...permissions should be implemented in the controller and not in the model". If you have an architecture-related doubt create another question and keep this question about the original problem. Btw: softwareengineering.stackexchange.com/help/on-topic
  
  – lifeisfoo
  Mar 26 at 11:48
  

  
  
  
  

add a comment | 

0

I need to implement pre hooks in mongoose that are based on the id of the user that does the request.

I can't access the initial function context (userId, permissions, etc) and use it in mongoose pre hooks.

let writePermissionCondition = async function(next) 
 let ctx = getCurrentContext();
 next();

As I can't send the current context in the mongoose model, I can't access the userId that does the actual request.

Edit: a little more info on the architecture and what I'm trying to achieve

1) The user makes a request to the service (listening to events. ex: user/create, user/delete, user/find, etc)

2) The event calls a CRUD function

3) The Model used in the CRUD has ReadPermission and WritePermission middlewares (hooks)

4) The ReadPermission and WritePermission verifies the user that makes the request if, in fact, has permissions to read or write. This is the step where I need to know what user tried to access that Model.

I might be wrong, and the permissions should be implemented in the controller and not in the model.

node.js mongoose

share|improve this question

edited Mar 25 at 20:22

ktln2003

asked Mar 25 at 6:53

ktln2003ktln2003

12

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  could you add a sample code of your getCurrentContext() implementation? This will be helpful in order to have a good answer for your problem.
  
  – lifeisfoo
  Mar 25 at 12:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  you initial question was about a mongoose problem "I can't access the initial function context (userId, permissions, etc) and use it in mongoose pre hooks" and two answers were given. After you edit, this question has become about a suggested architecture: "a little more info on the architecture and what I'm trying to achieve...permissions should be implemented in the controller and not in the model". If you have an architecture-related doubt create another question and keep this question about the original problem. Btw: softwareengineering.stackexchange.com/help/on-topic
  
  – lifeisfoo
  Mar 26 at 11:48
  

  
  
  
  

add a comment | 

I need to implement pre hooks in mongoose that are based on the id of the user that does the request.

I can't access the initial function context (userId, permissions, etc) and use it in mongoose pre hooks.

let writePermissionCondition = async function(next) 
 let ctx = getCurrentContext();
 next();

As I can't send the current context in the mongoose model, I can't access the userId that does the actual request.

Edit: a little more info on the architecture and what I'm trying to achieve

1) The user makes a request to the service (listening to events. ex: user/create, user/delete, user/find, etc)

2) The event calls a CRUD function

3) The Model used in the CRUD has ReadPermission and WritePermission middlewares (hooks)

4) The ReadPermission and WritePermission verifies the user that makes the request if, in fact, has permissions to read or write. This is the step where I need to know what user tried to access that Model.

I might be wrong, and the permissions should be implemented in the controller and not in the model.

node.js mongoose

share|improve this question

edited Mar 25 at 20:22

ktln2003

asked Mar 25 at 6:53

ktln2003ktln2003

12

let writePermissionCondition = async function(next) 
 let ctx = getCurrentContext();
 next();

share|improve this question

edited Mar 25 at 20:22

ktln2003

asked Mar 25 at 6:53

ktln2003ktln2003

12

share|improve this question

edited Mar 25 at 20:22

ktln2003

asked Mar 25 at 6:53

ktln2003ktln2003

12

asked Mar 25 at 6:53

ktln2003ktln2003

12

asked Mar 25 at 6:53

ktln2003ktln2003

12

2 Answers
2

active

oldest

votes

0

Set it to global var and use it on mongoose operation

let writePermissionCondition = async function(next) 
 let ctx = getCurrentContext();
 global.ctx = ctx
 next();

Now you can access global.ctx anywhere in the application.

share|improve this answer

answered Mar 25 at 7:04

ThamaraiselvamThamaraiselvam

4,79063150

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I could. But let's say you have 100 concurrent users that use this function. I need to know to userId of the user making the request when I call 'writePermissionCondition'
  
  – ktln2003
  Mar 25 at 12:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  global data of each request will be managed differently, so there is no problem. global is not a common place like database.
  
  – Thamaraiselvam
  Mar 25 at 12:10
  

  
  
  
  

add a comment | 

0

Mongoose provides many useful tools for solving complex situations like your question.

In your case you can user mongoose virtuals:

Virtuals are document properties that you can get and set but that do not get persisted to MongoDB.

You can start trying with a simple implementation like this:

yourSchema.virtual('context').
 get(function() return this.__context; ).
 set(function(ctx) 
 this.__context = ctx; 
 );

In this way you can call getCurrentContext(); where the context is available (e.g. during express req/res flow) and save it the model you've retrieved.

Example flow (pseudocode):

const user = User.get(req.id)
const context = getCurrentContext();
user.context = context;
//... save/update...

Now, when the user will be saved/updated, and your pre hooks are called, your validation code can access the context variable attached to retrieve your data.

share|improve this answer

answered Mar 25 at 13:23

lifeisfoolifeisfoo

7,48034472

add a comment | 

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0

Set it to global var and use it on mongoose operation

let writePermissionCondition = async function(next) 
 let ctx = getCurrentContext();
 global.ctx = ctx
 next();

Now you can access global.ctx anywhere in the application.

share|improve this answer

answered Mar 25 at 7:04

ThamaraiselvamThamaraiselvam

4,79063150

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I could. But let's say you have 100 concurrent users that use this function. I need to know to userId of the user making the request when I call 'writePermissionCondition'
  
  – ktln2003
  Mar 25 at 12:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  global data of each request will be managed differently, so there is no problem. global is not a common place like database.
  
  – Thamaraiselvam
  Mar 25 at 12:10
  

  
  
  
  

add a comment | 

0

Set it to global var and use it on mongoose operation

let writePermissionCondition = async function(next) 
 let ctx = getCurrentContext();
 global.ctx = ctx
 next();

Now you can access global.ctx anywhere in the application.

share|improve this answer

answered Mar 25 at 7:04

ThamaraiselvamThamaraiselvam

4,79063150

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I could. But let's say you have 100 concurrent users that use this function. I need to know to userId of the user making the request when I call 'writePermissionCondition'
  
  – ktln2003
  Mar 25 at 12:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  global data of each request will be managed differently, so there is no problem. global is not a common place like database.
  
  – Thamaraiselvam
  Mar 25 at 12:10
  

  
  
  
  

add a comment | 

Set it to global var and use it on mongoose operation

let writePermissionCondition = async function(next) 
 let ctx = getCurrentContext();
 global.ctx = ctx
 next();

Now you can access global.ctx anywhere in the application.

share|improve this answer

answered Mar 25 at 7:04

ThamaraiselvamThamaraiselvam

4,79063150

let writePermissionCondition = async function(next) 
 let ctx = getCurrentContext();
 global.ctx = ctx
 next();

share|improve this answer

answered Mar 25 at 7:04

ThamaraiselvamThamaraiselvam

4,79063150

answered Mar 25 at 7:04

ThamaraiselvamThamaraiselvam

4,79063150

answered Mar 25 at 7:04

ThamaraiselvamThamaraiselvam

4,79063150

0

Mongoose provides many useful tools for solving complex situations like your question.

In your case you can user mongoose virtuals:

Virtuals are document properties that you can get and set but that do not get persisted to MongoDB.

You can start trying with a simple implementation like this:

yourSchema.virtual('context').
 get(function() return this.__context; ).
 set(function(ctx) 
 this.__context = ctx; 
 );

In this way you can call getCurrentContext(); where the context is available (e.g. during express req/res flow) and save it the model you've retrieved.

Example flow (pseudocode):

const user = User.get(req.id)
const context = getCurrentContext();
user.context = context;
//... save/update...

Now, when the user will be saved/updated, and your pre hooks are called, your validation code can access the context variable attached to retrieve your data.

share|improve this answer

answered Mar 25 at 13:23

lifeisfoolifeisfoo

7,48034472

add a comment | 

0

Mongoose provides many useful tools for solving complex situations like your question.

In your case you can user mongoose virtuals:

Virtuals are document properties that you can get and set but that do not get persisted to MongoDB.

You can start trying with a simple implementation like this:

yourSchema.virtual('context').
 get(function() return this.__context; ).
 set(function(ctx) 
 this.__context = ctx; 
 );

In this way you can call getCurrentContext(); where the context is available (e.g. during express req/res flow) and save it the model you've retrieved.

Example flow (pseudocode):

const user = User.get(req.id)
const context = getCurrentContext();
user.context = context;
//... save/update...

Now, when the user will be saved/updated, and your pre hooks are called, your validation code can access the context variable attached to retrieve your data.

share|improve this answer

answered Mar 25 at 13:23

lifeisfoolifeisfoo

7,48034472

add a comment | 

Mongoose provides many useful tools for solving complex situations like your question.

In your case you can user mongoose virtuals:

Virtuals are document properties that you can get and set but that do not get persisted to MongoDB.

You can start trying with a simple implementation like this:

yourSchema.virtual('context').
 get(function() return this.__context; ).
 set(function(ctx) 
 this.__context = ctx; 
 );

In this way you can call getCurrentContext(); where the context is available (e.g. during express req/res flow) and save it the model you've retrieved.

Example flow (pseudocode):

const user = User.get(req.id)
const context = getCurrentContext();
user.context = context;
//... save/update...

Now, when the user will be saved/updated, and your pre hooks are called, your validation code can access the context variable attached to retrieve your data.

share|improve this answer

answered Mar 25 at 13:23

lifeisfoolifeisfoo

7,48034472

yourSchema.virtual('context').
 get(function() return this.__context; ).
 set(function(ctx) 
 this.__context = ctx; 
 );

const user = User.get(req.id)
const context = getCurrentContext();
user.context = context;
//... save/update...

share|improve this answer

answered Mar 25 at 13:23

lifeisfoolifeisfoo

7,48034472

answered Mar 25 at 13:23

lifeisfoolifeisfoo

7,48034472

answered Mar 25 at 13:23

lifeisfoolifeisfoo

7,48034472