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model.bulkCreate modifies the "options" by assigning "model" as an attribute to the object #12406

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sandeepraheja opened this issue Jun 22, 2020 · 5 comments · May be fixed by #12526
Open

model.bulkCreate modifies the "options" by assigning "model" as an attribute to the object #12406

sandeepraheja opened this issue Jun 22, 2020 · 5 comments · May be fixed by #12526
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good first issue type: bug

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@sandeepraheja
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@sandeepraheja sandeepraheja commented Jun 22, 2020 •
edited

Issue Description

While using model.bulkCreate, as we pass the options, an object which contains transaction, it comes modified after the execution

What are you doing?

We have called bulkCreate on a model object. The options object which is prepared as an argument to the function, if we check it after execution, it contains the reference to the model object.

Here is the link to the SSCCE for this issue: LINK-HERE 

// You can delete this code block if you have included a link to your SSCCE above!
// MINIMAL, SELF-CONTAINED code here (SSCCE/MCVE/reprex)

What do you expect to happen?

The options object should not have been modified.

What is actually happening?

The options object now have a reference to "model" object.

Output here

Additional context

When we checked the code in sequelize -> model.js, it reflected the assignment on the passed in argument, instead of using the cloned copy of "options"

image

Environment

  • Sequelize version: 5.21.10
  • Node.js version: 12.16.3
  • Operating System: MacOS Catalina, Ubuntu 18.04
  • If TypeScript related: TypeScript version: 4.28.9

Issue Template Checklist

How does this problem relate to dialects?

  • I think this problem happens regardless of the dialect.

Would you be willing to resolve this issue by submitting a Pull Request?

  • No, I don't have the time, although I believe I could do it if I had the time...
@walkerps
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@walkerps walkerps commented Jun 25, 2020 •
edited

Hey!, It's my first time contributing . I would like to take a stab at this issue.

Please correct me if i'm wrong here , in this issue all we need to do is create a copy of Model's object and assign it to option.model rather than assigning the reference to model's object right?
@sandeepraheja
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@sandeepraheja sandeepraheja commented Jun 25, 2020

Nope, I think you need to clone options (just like other implementations in the same file) using Object.assign,
Assign the cloned object to options.
and then let the model assignment in options work as it is.

This will make sure the passed in object reference is not polluted
@walkerps
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@walkerps walkerps commented Jun 25, 2020

oh yeah, thanks. On it
@JuarezLustosa
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@JuarezLustosa JuarezLustosa commented Jul 9, 2020

Hello, @walkerps are still working on this?
@shftrg shftrg linked a pull request that will close this issue Jul 18, 2020
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@shftrg
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@shftrg shftrg commented Jul 18, 2020

@JuarezLustosa I went ahead and raised a fix. Do review it
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fix(model): clone options object instead of modifying
5 participants
@JuarezLustosa @sandeepraheja @sushantdhiman @walkerps @shftrg
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