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EdmiError edmiRollbackModel(SdaiModel modelId,
SdaiVersion versionId,
SdaiOptions options);
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Rolls back the current version of an edmModel to a previous version. The model version is identified by the modelId and the version sequence number.
By default, all versions succeeding the new current version will be permanently deleted. Use options to prevent deletion of versions. Related functions: edmiCreateModelVersion, edmiDeleteModelVersion, edmiDeleteModelVersionBN, edmiGetModelVersionId, edmiGetModelVersionIdBN, edmiRollbackModel, edmiRollbackModelBN, edmiVersionGetAttr, edmiVersionGetAttrBN, edmiVersionGetAttrDatatype, edmiVersionGetAttrDatatypeBN.
Header:
#include "sdai.h"
Prototype:
EdmiError edmiRollbackModel(SdaiModel modelId,
SdaiVersion versionId,
SdaiOptions options);
Arguments:
Arguments
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| Type | Name | Comment | |
| SdaiModel | modelId | The modelId that uniquely identifies the edmModel in the EDMdatabase. | |
| SdaiVersion | versionId | The version sequence number, counting from one, that identifies the version of the edmModel to roll back to. | |
| SdaiOptions | options | Specifies the options to be used in the invocation of the edmiRollbackModel 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. |
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Return Value
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Options
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| Option | Comment |
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KEEP_ALL_MODEL_VERSIONS | No versions of the edmModel will be deleted when rolling back. |
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Example
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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", |
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"c:/tmp/MyFile.dia", |
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"MySchema", 0, &nWrn, &nErr); |
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/* Create Model */ |
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rstat = edmiGetRepository("MyRepository", &repId); |
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modelId = edmiCreateModelBN(repId, "MyModel", "MySchema", 0); |
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/* Populate Model */ |
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instId = edmiCreateInstanceAndPutAttrsBN(modelId, "MyEntity", 1, |
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"REAL_ATTR", sdaiREAL, 3.14); |
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/* Create version 1 */ |
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rstat = edmiCreateModelVersion("MyRepository", "MyModel", |
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"V1", &modelVersionId); |
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/* Change population */ |
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sdaiPutAttrBN(instId, "REAL_ATTR", sdaiINTEGER, 1); |
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/* Create version 2 */ |
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rstat = edmiCreateModelVersion("MyRepository", "MyModel", |
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NULL, &modelVersionId); |
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/* Get Id of version 1 */ |
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rstat = edmiGetModelVersionIdBN("MyRepository", "MyModel", |
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"V1", &modelVersionId, &version1Id); |
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/* Type is sdaiREAL */ |
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rstat = edmiVersionGetAttrDatatypeBN(instId, version1Id, |
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"REAL_ATTR", &type); |
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/* Value is 3.14 */ |
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if (type != sdaiREAL) goto error; |
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rstat = edmiVersionGetAttrBN(instId, version1Id, "REAL_ATTR", |
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type, &myReal); |
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/* Get Id of version 2 */ |
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attrId = sdaiGetAttrDefinitionBN("MySchema", "MyEntity", "REAL_ATTR"); |
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rstat = edmiGetModelVersionId(modelId, "version2", |
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&modelVersionId, &version2Id); |
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/* Type is now sdaiINTEGER */ |
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rstat = edmiVersionGetAttrDatatype(instId, version2Id, |
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attrId, &type); |
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/* Value is 1 */ |
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if (type != sdaiINTEGER) goto error; |
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rstat = edmiVersionGetAttr(instId, version2Id, attrId, |
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type, &myInteger); |
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/* Roll back to version 1 */ |
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rstat = edmiRollbackModel(modelId, version1Id, |
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KEEP_ALL_MODEL_VERSIONS); |
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/* Delete version 2 */ |
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edmiDeleteModelVersion(modelId, version2Id); |
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error: |
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. . . |
See also
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