Hello,
When I look at the documentation, I can only see the sample Python script to query the GraphQL API. If I click on the R tab, nothing happens.
Would it be possible to add the R sample script (and/or can someone share it here)?
Thanks!
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Hi @enricoferrero, and welcome to the Open Targets Community! 
I’m not sure what’s happening because I was able to access the R script in our documentation, but I have copied it below:
# Install relevant library for HTTP requests
library(httr)
# Set gene_id variable for AR (androgen receptor)
gene_id <- "ENSG00000169083"
# Build query string to get general information about AR and genetic constraint and tractability assessments
query_string = "
query target($ensemblId: String!){
target(ensemblId: $ensemblId){
id
approvedSymbol
biotype
geneticConstraint {
constraintType
exp
obs
score
oe
oeLower
oeUpper
}
tractability {
id
modality
value
}
}
}
"
# Set base URL of GraphQL API endpoint
base_url <- "https://api.platform.opentargets.org/api/v4/graphql"
# Set variables object of arguments to be passed to endpoint
variables <- list("ensemblId" = gene_id)
# Construct POST request body object with query string and variables
post_body <- list(query = query_string, variables = variables)
# Perform POST request
r <- POST(url=base_url, body=post_body, encode='json')
# Print data to RStudio console
print(content(r)$data)
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Thanks a lot @hcornu! That’s weird, I just checked again and I still can’t get to the R script in the docs - I guess it’s an issue with my browser (Microsoft Edge 97.0.1072.62) then.
2 Likes
I am wondering whether this R code works well or not? For me, It returns nothing. Here is the return:
Hi @Shicheng_Guo,
I am guessing you took this snippet from our documentation. The response is indeed empty because the tractability was not up-to-date with the latest changes - tractability no longer has an id.
This is the correct request:
query target($ensemblId: String!){
target(ensemblId: $ensemblId){
id
approvedSymbol
biotype
geneticConstraint {
constraintType
exp
obs
score
oe
oeLower
oeUpper
}
tractability {
label
modality
value
}
}
}
We have corrected the documentation, and the changes will be shortly available. Thanks for reporting!
2 Likes
