ChainQueries.ejs
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<script type="text/javascript" charset="utf-8">
document.observe("dom:loaded", function() {
buildNavigation([], ["<br />", "<a href=\"/examples/Count\">Count</a>",
"<a href=\"/examples/DefaultValues\">Default values</a>",
"<a href=\"/examples/fetchAssociations\">fetchAssociations</a>",
"<a href=\"/examples/MethodPassing\">MethodPassing</a>",
"<a href=\"/examples/Performance\">Performance</a>",
"<a href=\"/examples/SequelizeWithOptions\">SequelizeWithOptions</a>",
"<a href=\"/examples/ChainQueries\">Using the chainQueries function</a>",
"<a href=\"/examples/UsingMultipleModelFiles\">UsingMultipleModelFiles</a>",
"<a href=\"/examples/Associations\">Working with associations</a>"], { seperator: ' ' })
})
</script>
<div>
<a name="sequelize"></a>
<h1>Using the chainQueries function</h1>
<p></p>
</div>
<div class="seperator"></div>
<div>
<a name="app.js"></a>
<h2>app.js</h2>
<p>
This example demonstrates the use of chainQueries.
<pre>
var Sequelize = require(__dirname + "/../../lib/sequelize/Sequelize").Sequelize
var sys = require("sys")
var Class = function(){ sys.log("You've just created a new instance!") }
Class.prototype.add = function(a,b,callback){
this.result = a + b
sys.log("The result: " + this.result)
callback(this.result)
}
sys.log("First of all the old and obsolete way:")
Sequelize.chainQueries([
{add: (new Class()), params: [1, 2]},
{add: (new Class()), params: [2, 3]}
], function() {
sys.log("And we did it!")
})
sys.puts("")
sys.log("The new fashioned way is about removing the array and pass an arbitrary amount of parameters!")
sys.log("Just pass as many hashes as you want, but at the end a function as callback!")
Sequelize.chainQueries(
{add: new Class(), params: [1, 2]},
{add: new Class(), params: [2, 3]},
function() { sys.log("And we did it! Great!") }
)
sys.puts("")
sys.log("As you see we add some values two times.")
sys.log("Let's say you want to call a method on multiple objects with the same or no parameters!")
Sequelize.chainQueries(
{add: [new Class(), new Class()], params: [1, 2]},
function() { sys.log("And we did it! Great!") }
)</pre>
</p>
</div>