Setting primary key

RE: Setting primary key

Bindu — Wed, 13 Jun 2018 13:40:31 GMT

Hi Rohit,

In the below link you find various annotations and their usage in Chapter No. 8. Hope it is helpful.

Link: download.oracle.com/.../ejb-3_0-fr-spec-persistence.pdf

RE: Setting primary key

rommels — Wed, 13 Jun 2018 11:42:21 GMT

Hi Rohit,

Use @GeneratedValue along with @Id
@Id >> It will set the field as primary key
@GeneratedValue >> It will set the primary key as auto increment

<xsd:element name="Id" type="xsd:int">
<xsd:annotation>
<xsd:appinfo source="appian.jpa">@Id @GeneratedValue @Column(name="Id")</xsd:appinfo>
</xsd:annotation>
</xsd:element>

RE: Setting primary key

Shubham Aware — Wed, 13 Jun 2018 06:07:24 GMT

Hello rohit,

people have already given you an answer as @Id which is correct

for future reference go through this https://docs.appian.com/suite/help/18.2/Supported_XSD_Elements_and_JPA_Annotations.html

RE: Setting primary key

sushilkumarb — Wed, 13 Jun 2018 05:42:41 GMT

add @Id annotation before @Column(name="columnName", columnDefinition="datatype") in xsd and do not add @Id for multiple columns else you will get error while publishing datastore.

RE: Setting primary key

rohitr303 — Tue, 12 Jun 2018 07:22:52 GMT

Thanks alot for a quick response , it surely helped me.

RE: Setting primary key

krishnau3863 — Tue, 12 Jun 2018 07:15:06 GMT

Hi rohitr303

here is the code for generating primary key

<xsd:element name="id" nillable="true" type="xsd:int">
<xsd:annotation>
<xsd:appinfo source="appian.jpa">@Id @GeneratedValue</xsd:appinfo>
</xsd:annotation>
</xsd:element>

RE: Setting primary key

aratim — Tue, 12 Jun 2018 06:05:35 GMT

Hi Rohit,
@Id notation will be useful for defining primary key field.

RE: Setting primary key

sravanis918 — Mon, 11 Jun 2018 11:28:24 GMT

Hi,

You can use the below code for setting the primary key through XSD:
<xsd:element name="EmployeeId" nillable="true" type="xsd:int"><xsd:annotation><xsd:appinfo source="appian.jpa">@Id @GeneratedValue</xsd:appinfo></xsd:annotation></xsd:element>
If you want that particular field to set as primary key and auto generated then you can use above code in XSD file.

RE: Setting primary key

ravalik — Mon, 11 Jun 2018 10:42:48 GMT

Hi rohitr,

Please go through the link to get an idea on how to set the primary key.

docs.appian.com/.../Mapping_CDTs_to_Pre-defined_Database_Tables.html

Thanks,
ravalik

RE: Setting primary key

Smruti Swain — Mon, 11 Jun 2018 10:09:27 GMT

Hi Rohit,
My other fellow practitioners have already answered your query however for future use, I would suggest the reverse engineering approach where if you want to see these basic JPA notation usage in Appian XSD, what you could try, set the PK, autogenerated values for PK or FK references simply through create CDT from scratch option and then set what ever you want then generate the XSD of that CDT to see how it is configured in the XSD level. That might help.
Thanks

RE: Setting primary key

gurdeeps — Mon, 11 Jun 2018 09:47:46 GMT

Hi Rohit,
@Id notation should serve your purpose.

RE: Setting primary key

arikd398 — Mon, 11 Jun 2018 09:23:30 GMT

Hi rohitr303,

The following is an example of a typical XSD file where they have used @Id for setting the primary key:

<xsd:schema xmlns:xsd="www.w3.org/.../XMLSchema"
xmlns:tns="urn:com:appian:types:example"
targetNamespace="urn:com:appian:types:example">
<xsd:complexType name="Employee">
<xsd:sequence>
<xsd:element name="id" nillable="true" type="xsd:int">
<xsd:annotation>
<xsd:appinfo source="appian.jpa">
@Id
@GeneratedValue
</xsd:appinfo>
</xsd:annotation>
</xsd:element>
<xsd:element name="firstName" type="xsd:string" />
<xsd:element name="lastName" type="xsd:string" />
</xsd:sequence>
</xsd:complexType>
</xsd:schema>

Is it the only solution you are looking for or you have any other requirement ?

RE: Setting primary key

namratak356 — Mon, 11 Jun 2018 09:18:50 GMT

Hi rohitr303 ,

@Id, is used for setting Primary Key . Please find below an Example of Employee CDT , where id is set as Primary Key with JPA annotation @Id

<xsd:schema xmlns:xsd="www.w3.org/.../XMLSchema"

xmlns:tns="urn:com:appian:types:example"

targetNamespace="urn:com:appian:types:example">

<xsd:complexType name="Employee">

<xsd:sequence>

<xsd:element name="id" nillable="true" type="xsd:int">

<xsd:annotation>

<xsd:appinfo source="appian.jpa">

@Id

@GeneratedValue

</xsd:appinfo>

</xsd:annotation>

</xsd:element>

<xsd:element name="firstName" type="xsd:string" />

<xsd:element name="lastName" type="xsd:string" />

</xsd:sequence>

</xsd:complexType>

</xsd:schema>

RE: Setting primary key

JayaKrishna — Mon, 11 Jun 2018 09:09:09 GMT

<xsd:appinfo source="appian.jpa">@Column(length=255) @Id</xsd:appinfo>
@Id is the primarykey annotation

RE: Setting primary key

sankethv — Mon, 11 Jun 2018 09:05:01 GMT

Hello Rohit,

@Id is the annotation used for setting the primary key. Please find below example where I am setting column REQUEST_ID as primary key:
<xsd:element name="requestID" nillable="true" type="xsd:int">
<xsd:annotation>
<xsd:appinfo source="appian.jpa">@Id @GeneratedValue @Column(name="REQUEST_ID")</xsd:appinfo>
</xsd:annotation>
</xsd:element>

Also, find the related documentation at docs.appian.com/.../Supported_XSD_Elements_and_JPA_Annotations.html

RE: Setting primary key

vinayr214137 — Mon, 11 Jun 2018 09:01:41 GMT

Hi Rohit,

Use @Id notation for Primary Key