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added (some) query capability to MongoDB node.

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Dave C-J
2013-09-08 11:21:52 +01:00
parent 065d47d173
commit 06930cb65c
2 changed files with 118 additions and 29 deletions
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79
nodes/storage/66-mongodb.html
View File

@@ -27,10 +27,6 @@
</div>
</script>
<script type="text/x-red" data-help-name="mongodb out">
<p>A MongoDB output node.</p>
</script>
<script type="text/javascript">
RED.nodes.registerType('mongodb',{
category: 'config',
@@ -47,11 +43,59 @@
</script>
<script type="text/x-red" data-template-name="mongodb out">
<div class="form-row">
<label for="node-input-mongodb"><i class="icon-tag"></i> Server</label>
<input type="text" id="node-input-mongodb">
</div>
<div class="form-row">
<label for="node-input-collection"><i class="icon-briefcase"></i> Collection</label>
<input type="text" id="node-input-collection" placeholder="collection">
</div>
<div class="form-row">
<label>&nbsp;</label>
<input type="checkbox" id="node-input-payonly" placeholder="Only" style="display: inline-block; width: auto; vertical-align: top;">
<label for="node-input-payonly" style="width: 70%;">Only store msg.payload object ?</label>
</div>
<div class="form-row">
<label for="node-input-name"><i class="icon-tag"></i> Name</label>
<input type="text" id="node-input-name" placeholder="Name">
</div>
</script>
<script type="text/x-red" data-help-name="mongodb out">
<p>A simple MongoDB output node. Stores the <b>msg</b> object in a chosen collection.</p>
<p>By default MongoDB creates an <i>_id</i> property as the primary key - so repeated injections of the same <b>msg</b> will result in many database entries.</p>
<p>If this is NOT the desired behaviour - ie you want repeated entries to overwrite, then you must set the <b>msg._id</b> property to be a constant by the use of a previous function node.</p>
<p>This could be a unique constant or you could create one based on some other msg property.</p>
<p>Currently we do not limit or cap the collection size at all... this may well change.</p>
</script>
<script type="text/javascript">
RED.nodes.registerType('mongodb out',{
category: 'storage-output',
color:"rgb(218, 196, 180)",
defaults: {
mongodb: { type:"mongodb",required:true},
name: {value:""},
collection: {value:"",required:true},
payonly: {value:false}
},
inputs:1,
outputs:0,
icon: "mongodb.png",
align: "right",
label: function() {
return this.name||((this.mongodb)?RED.nodes.node(this.mongodb).label()+"//"+this.collection:"mongodb");
},
labelStyle: function() {
return this.name?"node_label_italic":"";
}
});
</script>
<script type="text/x-red" data-template-name="mongodb in">
<div class="form-row">
<label for="node-input-mongodb"><i class="icon-tag"></i> Server</label>
<input type="text" id="node-input-mongodb">
@@ -64,16 +108,17 @@
<label for="node-input-name"><i class="icon-tag"></i> Name</label>
<input type="text" id="node-input-name" placeholder="Name">
</div>
</script>
<script type="text/x-red" data-help-name="mongodb out">
<p>A MongoDB output node.</p>
<script type="text/x-red" data-help-name="mongodb in">
<p>Queries a MongoDB collection by using the <b>msg.payload</b> to be a MongoDB query statement as per the .find() function.</p>
<p>You may also (via a function) set a <b>msg.projection</b> object to constrain the returned fields, a <b>msg.sort</b> object and a <b>msg.limit</b> object.</p>
<p>All are optional - see the <a href="http://docs.mongodb.org/manual/reference/method/db.collection.find/" target="new"><i>MongoDB find docs</i></a> for examples.
</script>
<script type="text/javascript">
RED.nodes.registerType('mongodb out',{
category: 'storage-output',
RED.nodes.registerType('mongodb in',{
category: 'storage-input',
color:"rgb(218, 196, 180)",
defaults: {
mongodb: { type:"mongodb",required:true},
@@ -81,11 +126,13 @@
collection: {value:"",required:true},
},
inputs:1,
outputs:0,
outputs:1,
icon: "mongodb.png",
align: "right",
label: function() {
return this.name||this.collection||((this.mongodb)?RED.nodes.node(this.mongodb).label():"mongodb");
return this.name||((this.mongodb)?RED.nodes.node(this.mongodb).label()+"//"+this.collection:"mongodb");
},
labelStyle: function() {
return this.name?"node_label_italic":"";
}
});
</script>

46
nodes/storage/66-mongodb.js
View File

@@ -30,11 +30,11 @@ function MongoOutNode(n) {
RED.nodes.createNode(this,n);
this.collection = n.collection;
this.mongodb = n.mongodb;
this.payonly = n.payonly || false;
this.mongoConfig = RED.nodes.getNode(this.mongodb);
if (this.mongoConfig) {
var node = this;
this.clientDb = new mongo.Db(node.mongoConfig.db, new mongo.Server(node.mongoConfig.hostname, node.mongoConfig.port, {}), {w: 1});
this.clientDb.open(function(err,cli) {
if (err) { node.error(err); }
@@ -44,7 +44,8 @@ function MongoOutNode(n) {
else {
node.on("input",function(msg) {
delete msg._topic;
coll.save(msg,function(err,item){if (err){node.error(err);}});
if (node.payonly) coll.save(msg.payload,function(err,item){if (err){node.error(err);}});
else coll.save(msg,function(err,item){if (err){node.error(err);}});
});
}
});
@@ -63,4 +64,45 @@ MongoOutNode.prototype.close = function() {
}
}
function MongoInNode(n) {
RED.nodes.createNode(this,n);
this.collection = n.collection;
this.mongodb = n.mongodb;
this.mongoConfig = RED.nodes.getNode(this.mongodb);
if (this.mongoConfig) {
var node = this;
this.clientDb = new mongo.Db(node.mongoConfig.db, new mongo.Server(node.mongoConfig.hostname, node.mongoConfig.port, {}), {w: 1});
this.clientDb.open(function(err,cli) {
if (err) { node.error(err); }
else {
node.clientDb.collection(node.collection,function(err,coll) {
if (err) { node.error(err); }
else {
node.on("input",function(msg) {
msg.projection = msg.projection || {};
coll.find(msg.payload,msg.projection).sort(msg.sort).limit(msg.limit).toArray(function(err, items) {
if (err) { node.error(err); }
msg.payload = items;
delete msg.projection;
delete msg.sort;
delete msg.limit;
node.send(msg);
});
});
}
});
}
});
} else {
this.error("missing mongodb configuration");
}
}
RED.nodes.registerType("mongodb in",MongoInNode);
MongoInNode.prototype.close = function() {
if (this.clientDb) {
this.clientDb.close();
}
}