Here is my issue.
I have to filter an ImageLayer with OpenLayers 5, so I prepared this kind of code :
const params = layerToFilter.getSource().getParams();
delete params.CQL_FILTER;
params.CQL_FILTER = myFilter;
layerToFilter.getSource().updateParams(params);
This code works fine, but not if "myFilter" variable is a too big string.
For example, with a filter like 'FEATUREID IN (1,2,3,4...1000)', I get a HTTP 414 URI too long.
My question is : is there a way to force OpenLayers 5 to use POST request instead of GET request when it tries to refresh map layers ?
I have some workaround ideas like building a smaller filter and prepare a view for this filter on database side, or by making preprocessing also on database side, but it will be really easier if I could simply send POST request.
Any help or suggestion will be appreciated :-)
Many thanks in advance.
Geoserver can publish feature id as a property of a layer. So you dont have to use FEATUREID. You can use CQL_FILTER instead of FEATUREID
http://locahost:8080/?CQL_FILTER=id BETWEEN 1 AND 1000
Related
I need to pass correlation Id into the IHttpProvider to let them log it for debugging purpose. How should I do that? Thanks!
We don't have a great solution for you to provide your own correlation Id today, however it something that we are working on. Requests that are made to Graph will get assigned a request id and you should be able to see that in the response headers. You could add your own using header using .Request(options).
Im having trouble passing multiple parameters to my drill though report using an url.
I have got a single one working however when i try to add the next one it doesn't like what i have put.
="http://rpt.Test.local/ReportServer/Pages/ReportViewer.aspx?%2f%5bQuote+Tool%5d%2fChange%20Elec%20Split&PC="&Parameters!PC.Value
Above is the working one parameter and im now trying to add
MTC = Parameters!MTC.Value.
Just think im imputting wrong.
Cheers
Try this one.. almost there but just a small tweek:
="http://rpt.Test.local/ReportServer/Pages/ReportViewer.aspx?%2f%5bQuote+Tool%5d%2fChange%20Elec%20Split&"&PC=" &Parameters!PC.Value &"&MTC=" & Parameters!MTC.Value & "&rs:Command=Render"
I'm using Opeonlayers 3.18 + GeoServer. I can make a ogc filter for comparing a field and a value. How can i compare two fields?
Code below shows what i'm looking for:
var f = ol.format.ogc.filter.greaterThan('Field1', 100); // this works nicely
var f = ol.format.ogc.filter.greaterThan('Field1', 'Field2'); // this doesn't work
Equivalent working CQL filter is: 'Field1 > Field2'
Regards
This sort of filtering should work. I'd note that many databases may not have a way to perform that filter in an optimal way, and as such, there's a chance that the handling for such a filter is not correct.
The first thing to check out is if the GeoServer logs have any additional information. For most requests, there are log messages which will provide all the details (including the filter) for the request.
If OL3 is making a non-sense request, there should be some kind of parse error first. If the datastore is having trouble with the request, you might see an exception.
To help further, which version of GeoServer and which datastore are you using? Also, is there additional information in the logs?
Update: Based on the comment below, I checked out the Open Layers 3 source. If you look here, it looks like OL3 is treating the first argument as a properyName and the second as a literal. It is probably worth filling a bug/feature request on the project's GitHub page.
I have been banging my head over this for the past 3 days (No kidding!!!)....It seems like a very simple thing but I am just unable to do it. So I'm putting the question out here, and am open to any method which would work.
BACKGROUND : An advanced search form on submission used to generate an URL too large for the server. So the form had to be submitted via POST. So far, so good. Form submitted successfully, and the result was displayed. Only remaining problem was pagination.
As it's a POST call, it ruled out will pagination. While will-pagination merges param page to the existing params, but the problem is that it shows on url which results in the same error.
QUESTION: So is there any way, if the user clicks a link NEXT, I can
a) Update the page param
b) Keep the existing params
c) While not changing the URL
d) Transfer control back to the action in controller?
The only solution so far suggested was have a hidden form, repopulate it's value and submit again. The form's pretty complex, so if there is a cleaner way I'd like to know.
I see what you want from your comment. So editing my reply accordingly. You want the information as to which column is being selected in the sort to be available to the controller without having that information available in the url string, and you want to use GET for this not POST
The challenge you have is that you want to preserve state between requests and you need a mechanism for doing this. POST preserves that information by sending it in the body of the POST request. GET does this by allowing you to populate the query string. The other method for preserving state is to use a cookie.
You can manipulate the url with javascript on the page. There are tutorials online for that.
But if you just want a simple controller hack as you say in your comment then the simplest one I can think of is to allow the user to make the GET request to the url with the query params in it, then handle this request in two steps - step one saves the query information to the cookie, step two redirects them to the url with that query string data stripped, and you look on the cookie to see if it has those fields before building your data for that page. It's hacky but it works.
def sort
session[:sort] = params[:sort]
redirect_to url_without_the_query_string
end
There is also the new html 5 feature:
window.history.replaceState(“Replace”, “Page Title”, “/mypage”);
from this stackoverflow answer here: How to remove query string from url using javascript
However I'm not sure I'd recommend messing with the url after load like that (I don't know enough about that solution so I'd recommend you read that answer and see if that fits). So, if you MUST lose that data from the url string, because you need to somehow pass it between requests you either have to use POST, or use the session cookie/redirect method I describe above.
Does your html <form> have an action attribute? If not, add one that points to the page.
If you want to preserve the current GET params so that results from the POST can use , you will also need to modify the javascript triggered on the heading links so that as well as (or instead of) modifying the query string, they write the same data to hidden form fields (which of course then get posted in the body of the request). Your JS library may already include helpful functions for that.
I am using ColdFusion 9.0.1.
I have a new web site that uses Bikes.cfm and Makers.cfm as template pages. I need to be able to pass BikeID and MakerID to both of the these pages, along with other variables. I don't want to use the Actual page name in the URL, such as this:
MyDomain.com/Bikes.cfm?BikeID=1234&MakerID=1234
I want my URL to look more like this:
MyDomain.com/?BikeID=1234&MakerID=1234
I need to NOT specify the page name in the URL.
I want these two URLs to access different data:
MyDomain.com/?BikeID=1234&MakerID=1234 // goes to bike page
MyDomain.com/?MakerID=1234&BikeID=1234 // goes to maker page
So, if BikeID appears in the URL before MakerID, go to the Bikes.cfm page. If MakerID appears before BikeID, go the Makers.cfm page.
Is there an easy and existing method to arrange the URL keys in such a way to have them point to the appropriate page?
Should I just parse the the URL as a list and determine the first ID and go to the appropriate page? Is there a better way?
Any thoughts or hints or ideas would be appreciated.
UPDATE -- It certainly appears that using the order of parameters in a URL is a bad idea for the following reasons:
1) many programs append variables to the URL
2) some programs may reorder the variables
3) GoogleBot may not consider order relevant and will most likely not index the site correctly.
Thanks to everyone who provided advice in a positive manner that my approach was probably a bad idea and would not produce the results I wanted. Thanks to everyone who suggested alternate means to produce the results I wanted.
If anyone of you positive people would like to put your positive comment/advice as an answer, I'd be happy to accept it as the answer.
Despite my grave misgivings about the whole idea, here's how I would do it if I were forced to do so:
index.cfm:
<cfswitch expression="#ListFirst(cgi.query_string, '=')#">
<cfcase value="BikeID">
<cfinclude template="Bikes.cfm">
</cfcase>
<cfcase value="MakerID">
<cfinclude template="Makers.cfm">
</cfcase>
<cfdefaultcase>
<cfinclude template="Welcome.cfm">
</cfdefaultcase>
</cfswitch>