EdmiError edmiRollbackModelBN(SdaiString  repositoryName,
                               SdaiString  modelName,
                               SdaiString  modelVersionName,
                               SdaiOptions options);

Rolls back the current version of an edmModel to a previous version. The model version is identified by the names of the edmRepository, the edmModel and the version. By default, all versions succeeding the new current version will be permanently deleted. Use options to prevent deletion of versions.

Arguments

Type	Name	Comment
SdaiString	repositoryName	The name of the edmRepository in the EDMdatabase holding the edmModel to be rolled back. Repository names are case sensitive.
SdaiString	modelName	The name of the edmModel to roll back. Model names are case sensitive. The combination of the arguments <repositoryName> and <modelName> uniquely identifies an edmModel in the EDMdatabase.
SdaiString	modelVersionName	The name of the model version to roll back to.
SdaiOptions	options	Specifies the options to be used in the invocation of the edmiRollbackModelBN function. The <options> value is a bitwise OR between the available options listed below. If no option value is given, all model versions succeeding <versionId> will be permanently deleted from the edmModel.

Return Value

Error rendering macro 'excerpt-include' : User 'null' does not have permission to view the page 'US:_r_EDMInterface'.

Options

Option	Comment
KEEP_ALL_MODEL_VERSIONS	No versions of the edmModel will be deleted when rolling back.

Example

 EdmiError rstat;
 SdaiInteger nWrn, nErr;
 SdaiRepository repId;
 SdaiModel modelId;
 SdaiVersion version1Id, version2Id;
 SdaiModelVersion modelVersionId;
 SdaiInteger myInteger;
 SdaiReal myReal;
 SdaiInstance instId;
 SdaiAttr attrId;
 SdaiPrimitiveType type;
  
 /* Compile schema */
 rstat = edmiCompileFile("c:/data/MyFile.exp",
 "c:/tmp/MyFile.dia", 
 "MySchema", 0, &nWrn, &nErr); 
 /* Create Model */
 rstat = edmiGetRepository("MyRepository", &repId);
 modelId = edmiCreateModelBN(repId, "MyModel", "MySchema", 0);
 /* Populate Model */
 instId = edmiCreateInstanceAndPutAttrsBN(modelId, "MyEntity", 1,
 "REAL_ATTR", sdaiREAL, 3.14);  
 /* Create version 1 */
 rstat = edmiCreateModelVersion("MyRepository", "MyModel",
 "V1", &modelVersionId); 
 /* Change population */
 sdaiPutAttrBN(instId, "REAL_ATTR", sdaiINTEGER, 1);
 /* Create version 2 */
 rstat = edmiCreateModelVersion("MyRepository", "MyModel",
 NULL, &modelVersionId); 
 /* Get Id of version 1 */
 rstat = edmiGetModelVersionIdBN("MyRepository", "MyModel",
 "V1", &modelVersionId, &version1Id); 
 /* Type is sdaiREAL */
 rstat = edmiVersionGetAttrDatatypeBN(instId, version1Id,
 "REAL_ATTR", &type);
 /* Value is 3.14 */ 
 if (type != sdaiREAL) goto error;
 rstat = edmiVersionGetAttrBN(instId, version1Id, "REAL_ATTR",
 type, &myReal); 
 /* Get Id of version 2 */
 attrId = sdaiGetAttrDefinitionBN("MySchema", "MyEntity", "REAL_ATTR");
 rstat = edmiGetModelVersionId(modelId, "version2",
 &modelVersionId, &version2Id); 
 /* Type is now sdaiINTEGER */
 rstat = edmiVersionGetAttrDatatype(instId, version2Id,
 attrId, &type); 
 /* Value is 1 */
 if (type != sdaiINTEGER) goto error;
 rstat = edmiVersionGetAttr(instId, version2Id, attrId,
 type, &myInteger);
 /* Roll back to version 1 */
 rstat = edmiRollbackModelBN("MyRepository", "MyModel", "V1",
 KEEP_ALL_MODEL_VERSIONS); 
 /* Delete version 2 */
 edmiDeleteModelVersion(modelId, version2Id);
 error:
 . . .

See also

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