Develop Reference

"Evaluate" Function that is stored in MongoDB Server

My collection looks like this:
> db.projects_columns.find()
{ "_id" : "5b28866a13311e44a82e4b8d", "checkbox" : true }
{ "_id" : "5b28866a13311e44a82e4b8e", "field" : "_id", "title" : "ID", "sortable" : true }
{ "_id" : "5b28866a13311e44a82e4b8f", "field" : "Project", "title" : "Project", "editable" : { "title" : "Project", "placeholder" : "Project" } }
{ "_id" : "5b28866a13311e44a82e4b90", "field" : "Owner", "title" : "Owner", "editable" : { "title" : "Owner", "placeholder" : "Owner" } }
{ "_id" : "5b28866a13311e44a82e4b91", "field" : "Name #1", "title" : "Name #1", "editable" : { "title" : "Name #1", "placeholder" : "Name #1" } }
{ "_id" : "5b28866a13311e44a82e4b92", "field" : "Name #2", "title" : "Name #2", "editable" : { "title" : "Name #2", "placeholder" : "Name #2" } }
{ "_id" : "5b28866a13311e44a82e4b93", "field" : "Status", "title" : "Status", "editable" : { "title" : "Status", "type" : "select", "source" : [ { "value" : "", "text" : "Not Selected" }, { "value" : "Not Started", "text" : "Not Started" }, { "value" : "WIP", "text" : "WIP" }, { "value" : "Completed", "text" : "Completed" } ], "display" : "function (value, sourceData) { var colors = { 0: 'Gray', 1: '#E67C73', 2: '#F6B86B', 3: '#57BB8A' }; var status_ele = $.grep(sourceData, function(ele){ return ele.value == value; }); $(this).text(status_ele[0].text).css('color', colors[value]); }", "showbuttons" : false } }
You can see that in the very last document that I have stored a function as text.Now the idea is that I will request this data and will be in an Javascript Array format.
But I want to be able to have my function without the quotes! You can see that simply evaluating it will not work because I need to have it still needs to be inside of the object ready to be executed when the array is used.
How can I achieve this?
Thanks for any help!

There are two possible solutions, but neither particularly safe and you should strongly consider why you need to store functions as strings in the first place. That being said, you could do two things.
The simplest is to use eval. To do so, you would have to first parse the object like normal, and then set the property that you want to the result of eval-ing the function string, like so:
// Pass in whatever JSON you want to parse
var myObject = JSON.parse(myJSONString);
// Converts the string to a function
myObject.display = eval("(" + myObject.display + ")");
// Call the function with whatever parameters you want
myObject.display(param1, param2);
The additional parentheses are to make sure that evaluation works correctly. Note, that this is not considered safe by Mozilla and there is an explicit recommendation not to use eval.
The second option is to use the Function constructor. To do so, you would need to restructure your data so that you store the parameters separately, so you could do something like this:
var myObject = JSON.parse(myJSONString);
// displayParam1 and displayParam2 are the stored names of your parameters for the function
myObject.display = Function(myObject.displayParam1, myObject.displayParam2, myObject.display)
This method definitely takes more modification, so if you want to use your existing structure, I recommend eval. However, again, make sure that this is absolutely necessary because both are considered unsafe since outside actors could basically inject code into your server.

Add new element to array with setState

How to add new element to array with setState
I have this data
this.state = {
items : [
{ "id" : "324", "parent" : "qqqq", "text" : "Simple root node" },
{ "id" : "24", "parent" : "dwdw", "text" : "Root node" },
{ "id" : "55", "parent" : "ajson2", "text" : "Ch" },
{ "id" : "9866", "parent" : "ajson2", "text" : "oiiojio" },
]
}
I'm mapping the data
{this.state.items.sort((a,b) => a.newID < b.newID).map((item)=>
<ul>
<li key={item.id}><span>ID: </span>{item.id} <span>parent: </span>{item.parent} <span>text: </span>{item.text}</li>
</ul>
)}
and then I'm sorting the data by newID That I need to create it with setState
this.setState(prevState=>({newData: [...prevState.items, this.props.account.info]}));
How can I create new element with this.props.account.info add somthing like i++ I don't know actually
this.props.account.info It's adding data like
{ "id" : "324", "parent" : "qqqq", "text" : "Simple root node" }
So I need to add an element inside this will be like
{ "newID": "1", "id" : "324", "parent" : "qqqq", "text" : "Simple root node" }

So if you want to add "newID" field in the object, there is a way to do this using object spread operator.
{...this.props.account.info, "newID":"1"}
This will give you a new object with the "newID" field added with "1" as its value associated with it.
This is a shorthand for this:
Object.assign({}, this.props.account.info, {"newID": "1"});

How to back and forth in array of data?

I have a following data which I am iterating on paragraph, which performs different task in different steps. I am not getting how to load selected view and controller in angular and make current as active.
http://prntscr.com/fisflz
[{
"0" : {
"name" : "Select Event"
},
"1" : {
"name" : "Connect"
},
"2" : {
"name" : "Configure"
},
"3" : {
"name" : "Test"
},
"4" : {
"name" : "Finish"
}
}]
Hint will appreciable.
Thanks

How to show JSON as formatted view in html

I need to view JSON in my html page as formatted view. JSON come from database. I need to show it nut in Formatted view.
Just like
{
"crews": [{
"items": [
{
"year" : "2013",
"boat" : "Blue",
"position" : "1",
"name" : "Patrick Close",
"college" : "Pembroke",
"weight" : "14st 2lbs"
}, {
"year" : "2013",
"boat" : "Blue",
"position" : "2",
"name" : "Geordie Macleod",
"college" : "Christ Church",
"weight" : "13st 10lbs"
}]
}]
}
Anyone have any idea or suggestion ? or any resource that may help.
Edited: I want to create a JSON parser. User input different json and can view in formatted view.

Try JSON.stringify(data), its a Javascript function. Hope it might help.
Refer: Detail Explaination
If you are using PHP then use json_encode
Refer: json_encode manual

Since your are using angular-js, you can simply load your JSON feed from your controller then use the ng-repeat function to iterate over the items into your view page. Here down a sample where of how your HTML view can look like and you may need to style and build the blocks as per your needs:
<span>items:</span>
<span>[</span>
<br/>
<div class="item" ng-repeat="item in items">
<span>{</span><br/>
<span class="field">year : {{item.year}}</span><br/>
<span class="field">boat : {{item.boat}}</span><br/>
<span class="field">position : {{item.position}}</span><br/>
<span>}</span>
</div>
You can find a working sample in this JSFiddle.

First: your remote JSON is invalid: it's missing an ending bracket for crews.
It should be like this:
{
"crews": [{
"items": [
{
"year" : "2013",
"boat" : "Blue",
"position" : "1",
"name" : "Patrick Close",
"college" : "Pembroke",
"weight" : "14st 2lbs"
}, {
"year" : "2013",
"boat" : "Blue",
"position" : "2",
"name" : "Geordie Macleod",
"college" : "Christ Church",
"weight" : "13st 10lbs"
}]
}] // Missing this bracket
}
You didn't mention if your JSON is remote or not. I'm assuming not, so I'll use a local JavaScript var with eval function in this sample code.
<script type="text/javascript">
var content = {
"crews": [{
"items": [
{
"year" : "2013",
"boat" : "Blue",
"position" : "1",
"name" : "Patrick Close",
"college" : "Pembroke",
"weight" : "14st 2lbs"
}, {
"year" : "2013",
"boat" : "Blue",
"position" : "2",
"name" : "Geordie Macleod",
"college" : "Christ Church",
"weight" : "13st 10lbs"
}]
}]
};
var json = eval(content);
for (c in json.crews) {
var crew = json.crews[c];
for (i in crew.items) {
var item = crew.items[i];
console.log(item.year);
console.log(item.boat);
console.log(item.position);
console.log(item.name);
}
}
</script>
I'm using console.log to output, so you'll be able to see data only if you open the browser console:

java.lang.ClassCastException calling RedQueryBuilderFactory.create with args

This line in my JS file:
RedQueryBuilderFactory.create(config,
'SELECT "x0"."title", "x0"."priority" FROM "ticket" "x0" WHERE ("x0"."status" = (?))',
[]
);
works fine witih an empty array as the 3rd parameter. This parameter is supposed to be an array of strings according to the documentation and any sample code I can find. When I pass a string in the array it fails:
RedQueryBuilderFactory.create(config,
'SELECT "x0"."title", "x0"."priority" FROM "ticket" "x0" WHERE ("x0"."status" = (?))',
['in_process']
);
I get java.lang.ClassCastException in the Safari console. Here's the related part of the config if it's relevant:
var config = {
meta : {
tables : [ {
"name" : "ticket",
"label" : "Ticket",
"columns" : [ {
"name" : "title",
"label" : "Title",
"type" : "STRING",
"size" : 255
}, {
"name" : "priority",
"label" : "Priority",
"type" : "REF"
} ],
fks : []
} ],
types : [ {
"name" : "REF",
"editor" : "SELECT",
"operators" : [ {
"name" : "IN",
"label" : "any of",
"cardinality" : "MULTI"
}]
} ]
}
};

Looks like this is a bug in passing in parameter values. Internally it is expecting a collection but this is not happening.
Best if you raise a https://github.com/salk31/RedQueryBuilder bug report here?
NB Should be "IN" not "="