Insert does not work on model with composite id in loopback - loopbackjs

Question

I have a table named Xml_Mapping with composit ID on MYSQL.
When i try to insert into table; in runtime or from StrongLoop API Explorer, i could not insert.
When i debug, i see wrong insert sql :
INSERT INTO `Xml_Mapping`(`SiteId`,`SystemKeyId`,`TargetKey`) VALUES(1,1,'stockcode')
ON DUPLICATE KEY UPDATE
as you can see, "UPDATE" sql was not completed. So it could not be executed...
How can i solve this problem?
Xml_Mapping Table:
SiteId INT NOT NULL,
SystemKeyId INT NOT NULL,
TargetKey VARCHAR(100) NOT NULL,
PRIMARY KEY (SiteId, SystemKeyId, TargetKey),
CONSTRAINT XML_MAPPING_fk1 FOREIGN KEY (SiteId) REFERENCES site (Id),
INDEX XML_MAPPING_fk1 (SiteId)
Xml-mapping.json :
{
"name": "XmlMapping",
"base": "PersistedModel",
"idInjection": false,
"options": {
"validateUpsert": true
},
"mysql": {
"schema": "uygunca",
"table": "Xml_Mapping"
},
"properties": {
"SiteId": {
"type": "Number",
"id": 1,
"required": true,
"length": null,
"precision": 10,
"scale": 0,
"mysql": {
"columnName": "SiteId",
"dataType": "int",
"dataLength": null,
"dataPrecision": 10,
"dataScale": 0,
"nullable": "N"
},
"_selectable": false
},
"SystemKeyId": {
"type": "Number",
"id": 2,
"required": true,
"length": null,
"precision": 10,
"scale": 0,
"mysql": {
"columnName": "SystemKeyId",
"dataType": "int",
"dataLength": null,
"dataPrecision": 10,
"dataScale": 0,
"nullable": "N"
},
"_selectable": false
},
"TargetKey": {
"type": "String",
"id": 3,
"required": true,
"length": 100,
"precision": null,
"scale": null,
"mysql": {
"columnName": "TargetKey",
"dataType": "varchar",
"dataLength": 100,
"dataPrecision": null,
"dataScale": null,
"nullable": "N"
},
"_selectable": false
}
},
"validations": [],
"relations": {},
"acls": [],
"methods": []
}

Answer 1

Alter your table Xml_Mapping and set autoincrement for field SiteId
and you don't need to provide SiteId in JSON
Run
ALTER TABLE `Xml_Mapping`
MODIFY `SiteId` int(10) NOT NULL AUTO_INCREMENT
Change your model Xml-mapping.json : and set properties for SiteId "required": false,
It should be like
{
"name": "XmlMapping",
"base": "PersistedModel",
"idInjection": false,
"options": {
"validateUpsert": true
},
"mysql": {
"schema": "uygunca",
"table": "Xml_Mapping"
},
"properties": {
"SiteId": {
"type": "Number",
"id": 1,
"required": false,
"length": null,
"precision": 10,
"scale": 0,
"mysql": {
"columnName": "SiteId",
"dataType": "int",
"dataLength": null,
"dataPrecision": 10,
"dataScale": 0,
"nullable": "N"
},
"_selectable": false
},
"SystemKeyId": {
"type": "Number",
"id": 2,
"required": true,
"length": null,
"precision": 10,
"scale": 0,
"mysql": {
"columnName": "SystemKeyId",
"dataType": "int",
"dataLength": null,
"dataPrecision": 10,
"dataScale": 0,
"nullable": "N"
},
"_selectable": false
},
"TargetKey": {
"type": "String",
"id": 3,
"required": true,
"length": 100,
"precision": null,
"scale": null,
"mysql": {
"columnName": "TargetKey",
"dataType": "varchar",
"dataLength": 100,
"dataPrecision": null,
"dataScale": null,
"nullable": "N"
},
"_selectable": false
}
},
"validations": [],
"relations": {},
"acls": [],
"methods": []
}
and then use your JSON as
{
"SystemKeyId": 1,
"TargetKey": 'stockcode'
}