# How to write better scripts with MVEL **URL:** https://discuss.elastic.co/t/how-to-write-better-scripts-with-mvel/11819 **Category:** Elasticsearch **Created:** [May 5, 2013, 10:51am UTC](https://discuss.elastic.co/t/how-to-write-better-scripts-with-mvel/11819 "2013-05-05T10:51:38Z") **Posts on this page:** 7 **Page:** 1
### Author: ![Arjit\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@Arjit\_Gupta](https://discuss.elastic.co/u/Arjit_Gupta) #### Post date: [May 5, 2013, 10:51am UTC](https://discuss.elastic.co/t/how-to-write-better-scripts-with-mvel/11819/1 "2013-05-05T10:51:38Z")
Hi, I am trying to write script which updates a document ( deleting some fields ). The script is ctx.\_source.remove("title") this allows us to delete on field named title. How do I change the script to delete multiple fields. Where Can I read more about the script. I have one of the resource as [http://www.elasticsearch.org/guide/reference/api/update/](http://www.elasticsearch.org/guide/reference/api/update/) Thanks in advance. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
### Author: ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet) #### Post date: [May 5, 2013, 11:02am UTC](https://discuss.elastic.co/t/how-to-write-better-scripts-with-mvel/11819/2 "2013-05-05T11:02:18Z")
Does something like the following work? ctx.\_source.remove("title");ctx.\_source.remove("summary"); ## HTH David 😉 Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs Le 5 mai 2013 à 12:51, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) a écrit : > ctx.\_source.remove("title" -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
### Author: ![Arjit\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@Arjit\_Gupta](https://discuss.elastic.co/u/Arjit_Gupta) #### Post date: [May 5, 2013, 1:51pm UTC](https://discuss.elastic.co/t/how-to-write-better-scripts-with-mvel/11819/3 "2013-05-05T13:51:55Z")
ctx.\_source.remove("title");ctx.\_source.remove("summary"); Works well. But I was looking for something like ctx.\_source.removeAll({"title","summary"}); The number of fields can be any number, I know can concat the script that many times and it will work. Thanks , Arjit On Sun, May 5, 2013 at 4:32 PM, David Pilato [david@pilato.fr](mailto:david@pilato.fr) wrote: > Does something like the following work? > > ctx.\_source.remove("title");ctx.\_source.remove("summary"); > > ## HTH > > David 😉 > Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs > > Le 5 mai 2013 à 12:51, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) a écrit : > > > ctx.\_source.remove("title" > > -- > You received this message because you are subscribed to a topic in the > Google Groups "elasticsearch" group. > To unsubscribe from this topic, visit > [https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US](https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US) > . > To unsubscribe from this group and all its topics, send an email to > [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
### Author: ![sujoysett](https://avatars.discourse-cdn.com/v4/letter/s/2acd7d/32.png) [@sujoysett](https://discuss.elastic.co/u/sujoysett) #### Post date: [May 6, 2013, 5:54am UTC](https://discuss.elastic.co/t/how-to-write-better-scripts-with-mvel/11819/4 "2013-05-06T05:54:29Z")
Using a loop might help. { "script": "foreach(var1 : tag1) { ctx.\_source.remove(var1); }", "params": { "tag1": [ "title", "summary", "nextfield" ] } } U can keep updating the params as per the requirement. -- Sujoy. On Sunday, May 5, 2013 7:21:55 PM UTC+5:30, Arjit Gupta wrote: > ctx.\_source.remove("title");ctx.\_source.remove("summary"); > Works well. But I was looking for something like > ctx.\_source.removeAll({"title","summary"}); > The number of fields can be any number, I know can concat the script that > many times and it will work. > > Thanks , > Arjit > > On Sun, May 5, 2013 at 4:32 PM, David Pilato \<[da...@pilato.fr](mailto:da...@pilato.fr)\ > > > wrote: > > > Does something like the following work? > > > > ctx.\_source.remove("title");ctx.\_source.remove("summary"); > > > > ## HTH > > > > David 😉 > > Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs > > > > Le 5 mai 2013 à 12:51, Arjit Gupta \<[arji...@gmail.com](mailto:arji...@gmail.com) \\> a > > écrit : > > > > > ctx.\_source.remove("title" > > > > -- > > You received this message because you are subscribed to a topic in the > > Google Groups "elasticsearch" group. > > To unsubscribe from this topic, visit > > [https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US](https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US) > > . > > To unsubscribe from this group and all its topics, send an email to > > [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \. > > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
### Author: ![Arjit\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@Arjit\_Gupta](https://discuss.elastic.co/u/Arjit_Gupta) #### Post date: [May 7, 2013, 7:31am UTC](https://discuss.elastic.co/t/how-to-write-better-scripts-with-mvel/11819/5 "2013-05-07T07:31:23Z")
Thanks a lot. Thats what I wanted. Can I know the where i can learn more on it Thanks , Arjit On Mon, May 6, 2013 at 11:24 AM, Sujoy Sett [sujoysett@gmail.com](mailto:sujoysett@gmail.com) wrote: > Using a loop might help. > > { > "script": "foreach(var1 : tag1) { ctx.\_source.remove(var1); }", > "params": { > "tag1": [ > "title", > "summary", > "nextfield" > ] > } > } > > U can keep updating the params as per the requirement. > > -- Sujoy. > > On Sunday, May 5, 2013 7:21:55 PM UTC+5:30, Arjit Gupta wrote: > > > ctx.\_source.remove("title");**ctx.\_source.remove("summary"); > > Works well. But I was looking for something like > > ctx.\_source.removeAll({"title"**,"summary"}); > > The number of fields can be any number, I know can concat the script that > > many times and it will work. > > > > Thanks , > > Arjit > > > > On Sun, May 5, 2013 at 4:32 PM, David Pilato [da...@pilato.fr](mailto:da...@pilato.fr) wrote: > > > > > Does something like the following work? > > > > > > ctx.\_source.remove("title");\*\*ctx.\_source.remove("summary"); > > > > > > ## HTH > > > > > > David 😉 > > > Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs > > > > > > Le 5 mai 2013 à 12:51, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com) a écrit : > > > > > > > ctx.\_source.remove("title" > > > > > > -- > > > You received this message because you are subscribed to a topic in the > > > Google Groups "elasticsearch" group. > > > To unsubscribe from this topic, visit [https://groups.google.com/d/](https://groups.google.com/d/)\*\* > > > topic/elasticsearch/\*\*QDVIPOpqRhw/unsubscribe?hl=en-\*\*US[https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US](https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US) > > > . > > > To unsubscribe from this group and all its topics, send an email to > > > elasticsearc...@\*\*[googlegroups.com](http://googlegroups.com). > > > > > > For more options, visit [https://groups.google.com/\*\*groups/opt\_out](https://groups.google.com/**groups/opt_out)[https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out) > > > . > > > > -- > > You received this message because you are subscribed to a topic in the > > Google Groups "elasticsearch" group. > > To unsubscribe from this topic, visit > > [https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US](https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US) > > . > > To unsubscribe from this group and all its topics, send an email to > > [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
### Author: ![sujoysett](https://avatars.discourse-cdn.com/v4/letter/s/2acd7d/32.png) [@sujoysett](https://discuss.elastic.co/u/sujoysett) #### Post date: [May 7, 2013, 8:28am UTC](https://discuss.elastic.co/t/how-to-write-better-scripts-with-mvel/11819/6 "2013-05-07T08:28:05Z")
u can try the official guide [http://mvel.codehaus.org/Language+Guide+for+2.0](http://mvel.codehaus.org/Language+Guide+for+2.0) -- Sujoy. On Tuesday, May 7, 2013 1:01:23 PM UTC+5:30, Arjit Gupta wrote: > Thanks a lot. Thats what I wanted. Can I know the where i can learn more > on it > > Thanks , > Arjit > > On Mon, May 6, 2013 at 11:24 AM, Sujoy Sett \<[sujo...@gmail.com](mailto:sujo...@gmail.com)\ > > > wrote: > > > Using a loop might help. > > > > { > > "script": "foreach(var1 : tag1) { ctx.\_source.remove(var1); }", > > "params": { > > "tag1": [ > > "title", > > "summary", > > "nextfield" > > ] > > } > > } > > > > U can keep updating the params as per the requirement. > > > > -- Sujoy. > > > > On Sunday, May 5, 2013 7:21:55 PM UTC+5:30, Arjit Gupta wrote: > > > > > ctx.\_source.remove("title");**ctx.\_source.remove("summary"); > > > Works well. But I was looking for something like > > > ctx.\_source.removeAll({"title"**,"summary"}); > > > The number of fields can be any number, I know can concat the script > > > that many times and it will work. > > > > > > Thanks , > > > Arjit > > > > > > On Sun, May 5, 2013 at 4:32 PM, David Pilato [da...@pilato.fr](mailto:da...@pilato.fr) wrote: > > > > > > > Does something like the following work? > > > > > > > > ctx.\_source.remove("title");\*\*ctx.\_source.remove("summary"); > > > > > > > > ## HTH > > > > > > > > David 😉 > > > > Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs > > > > > > > > Le 5 mai 2013 à 12:51, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com) a écrit : > > > > > > > > > ctx.\_source.remove("title" > > > > > > > > -- > > > > You received this message because you are subscribed to a topic in the > > > > Google Groups "elasticsearch" group. > > > > To unsubscribe from this topic, visit [https://groups.google.com/d/](https://groups.google.com/d/)\*\* > > > > topic/elasticsearch/\*\*QDVIPOpqRhw/unsubscribe?hl=en-\*\*US[https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US](https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US) > > > > . > > > > To unsubscribe from this group and all its topics, send an email to > > > > elasticsearc...@\*\*[googlegroups.com](http://googlegroups.com). > > > > > > > > For more options, visit [https://groups.google.com/\*\*groups/opt\_out](https://groups.google.com/**groups/opt_out)[https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out) > > > > . > > > > > > -- > > > You received this message because you are subscribed to a topic in the > > > Google Groups "elasticsearch" group. > > > To unsubscribe from this topic, visit > > > [https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US](https://groups.google.com/d/topic/elasticsearch/QDVIPOpqRhw/unsubscribe?hl=en-US) > > > . > > > To unsubscribe from this group and all its topics, send an email to > > > [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \. > > > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system) #### Post date: [July 6, 2017, 2:37am UTC](https://discuss.elastic.co/t/how-to-write-better-scripts-with-mvel/11819/7 "2017-07-06T02:37:58Z")