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EdmiError edmiRemoteUnsetAttrs(SdaiServerContext serverContextId,
SdaiInstance instanceId,
SdaiInteger attributes,
SdaiAttr attributeIds[],
SdaiInvocationId *edmiInvocationId);;
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Unsets one ore more attributes, identified by their attributeIds, of a specified instance, identified by its instanceId. The attributeIds are specified in the input buffer argument <attributeIds>. This operation is only applicable on the explicit attributes of application instances.
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Arguments
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| Type | Name | Comment |
| SdaiServerContext | serverContextId | Context identification, from edmiDefineServerContext |
| SdaiInstance | instanceId | A numeric instanceID that uniquely identifies the instance of interrest interest in the remote _EDMdatabase{_}.remote EDMdatabase |
| SdaiInteger | attributes | The number of attribute names in the <attributeIds> argument. |
| SdaiAttr | attributeIds[] | A buffer containing the attributeIds of all the attributes to be unset. |
| SdaiInvocationId | edmiInvocationId | Currently not used. |
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Return Value
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Options
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Example
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EdmiError rstat; SdaiServerContext myContext; SdaiInteger index, nHits; SdaiQueryResult qexRes; char condition[1024], *pCond; |
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SdaiOptions options; |
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/* Create Server Context */ |
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rstat = edmiDefineServerContext("MyContext", |
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"Johnny", "Supervisor", "cf37ftr", |
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"TCP", "9090", "MyServerHost", |
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NULL, NULL, NULL, NULL, NULL, &myContext); |
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/* Get Johnnys instance Id */ |
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nHits = 2; |
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index = 0; |
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options = ONLY_INSTANCE_IDS | SUBTYPES; |
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pCond = &condition[0]; |
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pCond += sprintf(pCond, "(LAST_NAME = 'Jackson')"); |
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pCond += sprintf(pCond, " AND (FIRST_NAME = 'Johnny')"); |
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pCond += sprintf(pCond, " AND (BIRTH_DATE = '19631216)')"); |
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rstat = edmiRemoteSelectInstances(myContext, "DataRepository", |
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"SocialRelations", "Person", condition, options, |
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NULL, NULL, NULL, &index, &nHits, &qexRes, |
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NULL, NULL, NULL, NULL); |
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if (nHits != 1) { |
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printf("\n%s", nHits ? "Ambigious" : "Not found"); |
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} else { |
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SdaiInstance _johnnysId = qexRes->instanceIds[0]; |
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SdaiAttr _attrIds[2]; |
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SdaiEntity _manEID; |
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SdaiModel _modelId; |
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/* Johnny was recently divorced. |
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His wife left him in his car. */ /* Get the model Id */ rstat = edmiRemoteGetModelBN(myContext, "DataRepository", |
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"SocialRelations", &_modelId, NULL); |
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/* Get Man entity Id */ |
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rstat = edmiRemoteGetEntity(myContext, _modelId, |
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"Man", &_manEID, NULL); |
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/* Get Man.Wife attribute Id */ |
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rstat = edmiRemoteGetAttrDefinitionBN(myContext, |
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"SocialRelations", "Man", "Wife", |
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&_attrIds[0], NULL); |
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/* Get Man.Car attribute Id */ |
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rstat = edmiRemoteGetAttrDefinitionBN(myContext, |
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"SocialRelations", "Man", "Car", |
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&_attrIds[1], NULL); |
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/* Unset Johnnys Wife and Car attributes */ |
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rstat = edmiRemoteUnsetAttrs(myContext, |
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_johnnysId, 2, _attrIds, NULL); |
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} edmiFreeQueryResult(qexRes); |
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. . . |
See also
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