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Getting query result

Glossary Item Box

The EntitySchemaQuery query result is a bpm'online property collection. Each instance of a collection is a string of a data set, returnable by query. You can get query results in the following ways:

  • Get a definite string of a data set by a primary key through calling the getEntity method (example 1).
  • Get entire resultant data set by calling getEntityCollection method (example 2).

Example 1. — Getting a definite data set string

// Get [Id] of card object.
var recordId = this.get("Id");
// Create Terrasoft.EntitySchemaQuery class instance with [Contact] root schema.
var esq = this.Ext.create("Terrasoft.EntitySchemaQuery", {
    rootSchemaName: "Contact"
});
// Add column with name of main contact of accounts that refers to given contact.
esq.addColumn("Account.PrimaryContact.Name", "PrimaryContactName");
// Get one record from selection on the basis of [Id] of card object and display it 
// in an info window.
esq.getEntity(recordId, function(result) {
    if (!result.success) {
        // error processing/logging, for example
        this.showInformationDialog("Data query error");
        return;
    }
    this.showInformationDialog(result.entity.get("PrimaryContactName"));
}, this);

Example 2. — Getting entire data set

var message = "";
// Create Terrasoft.EntitySchemaQuery class instance with [Contact] root schema.
var esq = Ext.create("Terrasoft.EntitySchemaQuery", {
    rootSchemaName: "Contact"
});
// Add column with account name that refers to given account.
esq.addColumn("Account.Name", "AccountName");
// Add column with name of main contact account that refers to given contact.
esq.addColumn("Account.PrimaryContact.Name", "PrimaryContactName");
// Get entire record colelction and display it in an infor window.
esq.getEntityCollection(function (result) {
    if (!result.success) {
        // error processing/logging, for example
        this.showInformationDialog("Data query error");
        return;
    }
    result.collection.each(function (item) {
        message += "Account name: " + item.get("AccountName") +
        " - primary contact name: " + item.get("PrimaryContactName") + "\n";
    });
    this.showInformationDialog(message);
}, this);

Table 1. — Query result getting method

Method
getEntity(primaryColumnValue, callback, scope)

returns entity instance on set primary key [primaryColumnValue]. It calls [callback] function in [scope] context after data receipt.

primaryColumnValue String/Number Is a primary key value.
callback Function Is a function, called upon receipt of server response.
scope Object Context where [callback] function will be called.
getEntityCollection(callback, scope)

returns collection of entity instances that represent current query results. It calls [callback] function in [scope] context after data receipt.

callback Function Is a function that will be called upon receipt of server response.
scope Object Is a context where [callback] function will be called.

See Also

© bpm'online 2002-2018.

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