New data migration fulfillment

[sujithvn]

Resolves #6472
Impact: breaking
Type: feature

This is replacement PR for #6544

Issue

Migrate data to the new format required for the new FFT plugins

Solution

We have 3 stages in a single migration;

• Copies over the existing Shipments & FlatRateFulfillmentRestrictions collections to Fulfillment & FulfillmentRestrictions collections respectively
• Updates the Fulfillment collection with the newly introduced fields (fulfillmentType & fulfillmentMethod). Since the existing user base had only Shipping/Flatrate as the fulfillment type/method till date, we would be using those values to update collection
• update the Groups collection with the new permissions

Breaking changes

The 2nd stage above handles the breaking change where we would be using the possible existing values as the values or newly introduced fields.

Testing

In an existing installation, perform the data-migration. Update the installation to use the new version having fulfillment types. All activities in admin/shop (related to Products/Orders/FF-types/Catalogs/Carts) should continue to work without issues

To test migration steps, install api-migrations package and include the below entry in the migrator.config.js file.

export default {
  tracks: [
    {
      namespace: "fulfillment",
      package: "../reaction/packages/api-plugin-fulfillment",
      version: 2
    }
  ]
};

Run the command:
MONGO_URL=mongodb://localhost:27017/reaction npx migrator migrate

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[zenweasel]

Just suggesting using regular operations rather than bulk operations

[zenweasel]

This will probably work but it's not really what the bulkWrite API is really for an would probably be better as written as a single query. Bulkwrite is when you are doing a large amount of atomic operations, not one large one.

[zenweasel]

typo in comment: dealing