fetchAndAdd returns always cached data for dynamic firestorePath

[RolandCsibrei]

export const code = {
  firestorePath: 'codelist/{list}/values',
  firestoreRefType: 'collection',
  moduleName: 'code',
  statePropName: 'codes',
  namespaced: true,
  state: {
  },
  actions: {
    async getCodes ({ commit, dispatch }, list) {
      dispatch('fetchAndAdd', { list: list })
    }
  }
}

Despite that list changes in getCodes, the result is still read from cache, because pathVariables are not taken into account when building the identifier:

        const identifier = createFetchIdentifier({where, orderBy})
        const fetched = state._sync.fetched[identifier]

vuex-easy-firestore/src/module/actions.ts

Line 244 in d94b673

const identifier = createFetchIdentifier({where, orderBy})

Can be?

        const identifier = createFetchIdentifier({where, orderBy, pathVariables})

[mesqueeb]

@RolandCsibrei thanks for looking into this and also providing me with a solution. I made the change as per your suggestion in v1.34.5
Please try it and let me know. 😄

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[RolandCsibrei]

Sadly this doesn't fix all the issues.

The following code snipet shows the problem with caching:

export const code = {
  firestorePath: 'codelist/{list}/values',
  firestoreRefType: 'collection',
  moduleName: 'code',
  statePropName: 'codes',
  namespaced: true,
  state: {
  },
  actions: {
    async getCodes ({ dispatch }) {
      dispatch('fetchAndAdd', { list: 'list1' })
      dispatch('fetchAndAdd', { list: 'list2' })
      dispatch('fetchAndAdd', { list: 'list3' })

// make some changes in the FB console and call getCodes again
// changes are not reflected, data is read from the cache
    }
  }
}

In some cases this behaviour is ok, however maybe an option should be added, like nocache, to force rereading of the data from the db?

Thank you!

[RolandCsibrei]

The cached data got crazy after calling fetchAndAdd a few times with changig dynamic pathVariable, maybe there is a problem with object references.

[mesqueeb]

@RolandCsibrei
What do you mean with "data got crazy" ?
Can you try and explain to me a little more about exactly what the problem is you're facing?

[RolandCsibrei]

Writing from my phone so I will be less verbose. If you call fetchaAndAdd with pathVariable1 it returns fresh data, no caching. Call fetchaAndAdd again with pathVariable2, returns fresh data, no caching. Now call fetchaAndAdd with the same pathVariable1, it hits the cache, returns data, but dbrefs seems to be bound to data defined by pathVariable2, and not pathVariable1.

[mesqueeb]

@RolandCsibrei I completely understand now. I'll try and create a failing test based on these steps, then I'll try to fix that test asap.

[mesqueeb]

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[louisameline]

I am wondering if we should allow the change of path variables after instantiation.
Common sense says to have 1 resource = 1 module, and that's what is considered so far for the next version of the library.
I'm just wondering if someone will come up and say "I need to do it because I have 500 documents loaded at the same time and I can't afford to instantiate a module for each of them as it would consume too much memory".
But is it likely? Destroying documents when we don't need them would let the garbage collector do its work. The data could even survive in the store after the destruction of the module, thus leaving no memory overhead either.
What would be other arguments for keeping the possibility to change variables of the path? Any feedback appreciated!

[louisameline]

Using a single module relates to #164