What is the same function in postgres as mongoose middleware?





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Here is the link about mongoose middleware: https://mongoosejs.com/docs/middleware.html



My case is I want to update some fields after a SQL query from database when client user send request to call my api. And the fields which need to be updated is based on Date, so they will be updated frequently.



Update these fields in the initialization of my application is not enough.



With mongoose, I can use below way:



schema.post('findOne', function(doc, next) {

  const doc = updateFields(doc);

  doc

    .save()

    .then(() => next())

    .catch(next);

})


How can I do this using postgresql?



I find a way but it seems duplicated.



The way is using UPDATE and RETURNING. But I have to write this SQL everywhere.



Or, I can encapsulate a method and call it firstly when need update the fields? I think it's duplicated either.



So, what's the best way for my case? thanks.






postgresql







share|improve this question































    0















    Here is the link about mongoose middleware: https://mongoosejs.com/docs/middleware.html



    My case is I want to update some fields after a SQL query from database when client user send request to call my api. And the fields which need to be updated is based on Date, so they will be updated frequently.



    Update these fields in the initialization of my application is not enough.



    With mongoose, I can use below way:



    schema.post('findOne', function(doc, next) {
    
  const doc = updateFields(doc);
    
  doc
    
    .save()
    
    .then(() => next())
    
    .catch(next);
    
})


    How can I do this using postgresql?



    I find a way but it seems duplicated.



    The way is using UPDATE and RETURNING. But I have to write this SQL everywhere.



    Or, I can encapsulate a method and call it firstly when need update the fields? I think it's duplicated either.



    So, what's the best way for my case? thanks.






    postgresql







    share|improve this question



























      0












      0








      0








      Here is the link about mongoose middleware: https://mongoosejs.com/docs/middleware.html



      My case is I want to update some fields after a SQL query from database when client user send request to call my api. And the fields which need to be updated is based on Date, so they will be updated frequently.



      Update these fields in the initialization of my application is not enough.



      With mongoose, I can use below way:



      schema.post('findOne', function(doc, next) {
      
  const doc = updateFields(doc);
      
  doc
      
    .save()
      
    .then(() => next())
      
    .catch(next);
      
})


      How can I do this using postgresql?



      I find a way but it seems duplicated.



      The way is using UPDATE and RETURNING. But I have to write this SQL everywhere.



      Or, I can encapsulate a method and call it firstly when need update the fields? I think it's duplicated either.



      So, what's the best way for my case? thanks.






      postgresql







      share|improve this question
















      Here is the link about mongoose middleware: https://mongoosejs.com/docs/middleware.html



      My case is I want to update some fields after a SQL query from database when client user send request to call my api. And the fields which need to be updated is based on Date, so they will be updated frequently.



      Update these fields in the initialization of my application is not enough.



      With mongoose, I can use below way:



      schema.post('findOne', function(doc, next) {
      
  const doc = updateFields(doc);
      
  doc
      
    .save()
      
    .then(() => next())
      
    .catch(next);
      
})


      How can I do this using postgresql?



      I find a way but it seems duplicated.



      The way is using UPDATE and RETURNING. But I have to write this SQL everywhere.



      Or, I can encapsulate a method and call it firstly when need update the fields? I think it's duplicated either.



      So, what's the best way for my case? thanks.






      postgresql




      postgresql






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Jan 3 at 8:35







      slideshowp2

















      asked Jan 3 at 8:15









      slideshowp2slideshowp2

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          Design correctly your database schema (and be sure to have appropriate database indexes, and be aware of database normalization). Then explicit the set of SQL requests your application should make.



          You might be interested by triggers (which looks similar to what you call "middleware")



          Most of the requests would be in prepared statements, using PQprepare in the initialization of your application.



          Be aware that MongoDB is a NoSQL database, but PostGreSQL is a relational database, so they require different mindsets and approaches and should be used differently.






          share|improve this answer


























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            1 Answer
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            oldest

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            1 Answer
            1






            active

            oldest

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            active

            oldest

            votes






            active

            oldest

            votes









            1














            Design correctly your database schema (and be sure to have appropriate database indexes, and be aware of database normalization). Then explicit the set of SQL requests your application should make.



            You might be interested by triggers (which looks similar to what you call "middleware")



            Most of the requests would be in prepared statements, using PQprepare in the initialization of your application.



            Be aware that MongoDB is a NoSQL database, but PostGreSQL is a relational database, so they require different mindsets and approaches and should be used differently.






            share|improve this answer






























              1














              Design correctly your database schema (and be sure to have appropriate database indexes, and be aware of database normalization). Then explicit the set of SQL requests your application should make.



              You might be interested by triggers (which looks similar to what you call "middleware")



              Most of the requests would be in prepared statements, using PQprepare in the initialization of your application.



              Be aware that MongoDB is a NoSQL database, but PostGreSQL is a relational database, so they require different mindsets and approaches and should be used differently.






              share|improve this answer




























                1












                1








                1







                Design correctly your database schema (and be sure to have appropriate database indexes, and be aware of database normalization). Then explicit the set of SQL requests your application should make.



                You might be interested by triggers (which looks similar to what you call "middleware")



                Most of the requests would be in prepared statements, using PQprepare in the initialization of your application.



                Be aware that MongoDB is a NoSQL database, but PostGreSQL is a relational database, so they require different mindsets and approaches and should be used differently.






                share|improve this answer















                Design correctly your database schema (and be sure to have appropriate database indexes, and be aware of database normalization). Then explicit the set of SQL requests your application should make.



                You might be interested by triggers (which looks similar to what you call "middleware")



                Most of the requests would be in prepared statements, using PQprepare in the initialization of your application.



                Be aware that MongoDB is a NoSQL database, but PostGreSQL is a relational database, so they require different mindsets and approaches and should be used differently.







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Jan 3 at 8:30

























                answered Jan 3 at 8:23









                Basile StarynkevitchBasile Starynkevitch

                180k13174375




                180k13174375
































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