This endpoint is used to create a configuration for Merge iModel transformation.

Merge iModel transformation is used for synchronizing changes between fork and main iModels in either direction.

Merge iModel transformation should be used to synchronize changes between main and fork iModels created using "Fork iModel" operation in iModels API whereas Merge Fork should be used with forks created using one of Create Fork, Filter IModel, Filter SubCategories, Filter By View Definition transformations.

Note: Creating a configuration does not run the transformation. To run the transformation, please see transformations reference.

Merge iModel transformation requirements

---

iModel fork must be created using Fork iModel operation in iModels API. Additionally, all elements in both fork and main iModels must have FederationGuid property set to a non null value. If that is not the case, PopulateFederationGuids transformation can be used to set missing FederationGuid values.

Merge direction

---

Source and target (project & iModel) properties mark the data flow direction:

• If sourceIModelId is iModel fork and targetIModelId is main iModel, it means that iModel fork is being merged to main iModel.
• If sourceIModelId is main iModel and targetIModelId is iModel fork, it means that main iModel is being merged to iModel fork.

Running consecutive transformations for this configuration will keep synchronizing newly added changes in the specified direction.

Transformation state persistence in iModel fork

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In addition to exported data, the transformer will also push some additional metadata to iModel fork. This metadata contains:

1. BisCore:RepositoryLink and BisCore:ExternalSource elements that mark the source where the data was imported from.
2. A "Scope" BisCore:ExternalSourceAspect that contains Synchronization changeset metadata that is needed by the transformation service to process any later changes correctly.

Authentication

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Requires Authorization header with valid Bearer token for scope itwin-platform.

For more documentation on authorization and how to get access token visit OAUTH2 Authorization page.

Authorization

---

You must have imodels_write assigned at the target project level and imodels_read assigned at the source project level within related configuration. If permissions at the project level are not configured, then you must have same assigned at the iModel level.

Alternatively, you must be an Organization Administrator for the Organization that owns a given project the iModel belongs to.

An Organization Administrator must have at least one of the following roles assigned in User Management: Account Administrator, Co-Administrator, or CONNECT Services Administrator. For more information about User Management see Bentley Communities Licensing, Cloud, and Web Services wiki page.

Important: Merge iModel transformation is in closed preview mode currently and only selected applications can utilize it.

Rate limits

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All iTwin Platform API operations have a rate limit. For more documentation on that visit Rate limits and quotas page.

{
    "transformName": "Example name",
    "sourceProjectId": "00000000-0000-0000-0000-000000000000",
    "sourceIModelId": "00000000-0000-0000-0000-000000000000",
    "targetProjectId": "00000000-0000-0000-0000-000000000000",
    "targetIModelId": "00000000-0000-0000-0000-000000000000",
    "comment": "Example comment"
}

{
    "configuration": {
        "id": "00000000-0000-0000-0000-000000000000",
        "transformName": "Transformation name",
        "comment": "comment",
        "createdDateTime": "2021-08-02T14:51:33.6133333Z",
        "modifiedDateTime": "2021-08-02T14:52:33.6133333Z",
        "transformType": "MergeIModel",
        "_links": {
            "sourceIModel": {
                "href": "https://api.bentley.com/imodels/00000000-0000-0000-0000-000000000000"
            },
            "targetIModel": {
                "href": "https://api.bentley.com/imodels/00000000-0000-0000-0000-000000000000"
            },
            "sourceProject": {
                "href": "https://api.bentley.com/itwins/00000000-0000-0000-0000-000000000000"
            },
            "targetProject": {
                "href": "https://api.bentley.com/itwins/00000000-0000-0000-0000-000000000000"
            }
        }
    }
}

{
    "error": {
        "code": "HeaderNotFound",
        "message": "Header Authorization was not found in the request. Access denied."
    }
}

{
    "error": {
        "code": "InsufficientPermissions",
        "message": "The user has insufficient permissions for the requested operation."
    }
}

{
    "error": {
        "code": "IModelNotFound",
        "message": "Requested IModel is not available."
    }
}

{
    "error": {
        "code": "MissingRequestBody",
        "message": "Request body was not provided."
    }
}

{
    "error": {
        "code": "RateLimitExceeded",
        "message": "The client sent more requests than allowed by this API for the current tier of the client."
    }
}