I'm trying to use a JSON, to eventually import it into Neo4j.
I use something like, it's a big JSON string:
WITH [
{"fullname":"Full name","note":"f","addr":[],"phone":[],"email":[{"value":"mail#city.com"}],"first_name":"","last_name":""},
..
] AS contacts
The colors of the first contact is mostly orange, then the other contacts become green, then black.
I get the following error:
Invalid input '"': expected whitespace, an identifier, UnsignedDecimalInteger, a property key name or '}'
I can view my JSON file with http://jsonviewer.stack.hu/ And it looks fine
Do I need to escape some kind of character, so that Neo4j understands it?
Edit:
Based on Martins answer, I removed the quotes using a regex in PHP from:
Remove double-quotes from a json_encoded string on the keys
Remove the quotation marks around the keys. The error message tells you that it expects a property key. Cypher does not use JSON here.
WITH [
{fullname:"Full name",note:"f",addr:[],phone:[],
email:[{value:"mail#city.com"}],
first_name:"",last_name:""}
] AS contacts
RETURN contacts
A neo4j driver or client library will handle data passed from dictionary like structures as parameters: https://neo4j.com/docs/developer-manual/current/cypher/#cypher-parameters
If you want to work with JSON and maybe load it from external sources you should have a look at the APOC procedures: https://neo4j-contrib.github.io/neo4j-apoc-procedures/.
This for example converts a JOSN string to a map that can be used in Cypher: https://neo4j-contrib.github.io/neo4j-apoc-procedures/#_from_tojson
CALL apoc.convert.fromJsonMap(
'{"fullname":"Full name","note":"f","addr":[],"phone":[],
"email":[{"value":"mail#city.com"}],"first_name":"","last_name":""}'
)
YIELD value
RETURN value
Related
Cross posting from Julia Discourse in case anyone here has any leads.
I’m just looking for some insight into why the below code is returning a dataframe containing just the first line of my json file. If you’d like to try working with the file I’m working with, you can download the aminer_papers_0.zip from the Microsoft Open Academic Graph site, I’m using the first file in that group of files.
using JSON3, DataFrames, CSV
file_name = "path/aminer_papers_0.txt"
json_string = read(file_name, String)
js = JSON3.read(json_string)
df = DataFrame([js])
The resulting DataFrame has just one line, but the column titles are correct, as is the first line. To me the mystery is why the rest isn’t getting processed. I think I can rule out that read() is only reading the first JSON object, because I can index into the resulting object and see many JSON objects:
enter image description here
My first guess was maybe the newline \n was causing escape issues, and tried to use chomp to get rid of them, but couldn’t get it to work.
Anyway - any help would be greatly appreciated!
I think the problem is that the file is in JSON Lines format, and the JSON3 library only returns the first valid JSON value that it finds at the start of a string unless told otherwise.
tl;dr
Call JSON3.read with the keyword argument jsonlines=true.
Why?
By default, JSON3 interprets a string passed to its read function as a single "JSON text", defined by RFC 8259 section 1.3.2:
A JSON text is a serialized value....
(My emphasis on the use of the indefinite singular article "a.") A "JSON value" is defined in section 1.3.3:
A JSON value MUST be an object, array, number, or string, or one of the following three literal names: false, null, true.
A string with multiple JSON values in it is technically multiple "JSON texts." It is up to the parser to determine what part of the string argument you give it is a JSON text, and the authors of JSON3 chose as the default behavior to parse from the start of the string to the end of the first valid JSON value.
In order to get JSON3 to read the string as multiple JSON values, you have to give it the keyword option jsonlines=true, which is documented as:
jsonlines: A Bool indicating that the json_str contains newline delimited JSON strings, which will be read into a JSON3.Array of the JSON values. See jsonlines for reference. [default false]
Example
Take for example this simple string:
two_values = "3.14\n2.72"
Each one of these lines is a valid JSON serialization of a number. However, when passed to JSON3.read, only the first is parsed:
using JSON3
#assert JSON3.read(two_values) == 3.14
Using jsonlines=true, both values are parsed and returned as a JSON3.Array struct:
#assert JSON3.read(two_values, jsonlines=true) == [3.14, 2.72]
Other Packages
The JSON.jl library, which people might use by default given the name, does not implement parsing of JSON Lines strings at all, leaving it up to the caller to properly split the string as needed:
using JSON
JSON.parse(two_values)
# ERROR: Expected end of input
# Line: 1
# Around: ...3.14 2.72...
# ^
A simple way to implement reading multiple values is to use eachline:
#assert [JSON.parse(line) for line in eachline(IOBuffer(two_values))] == [3.14, 2.72]
i am getting a json data after hitting an API .
when i try to load that json into python using json.loads(response.text), I am getting a delimiter error .
when checked few fields in json dose not have "," separating them.
{
"id":"142379",
"label":"1182_Mailer_PROD",
"location":"Bangalore, India",
"targetType":"HTTPS performance",
"frequency":"15",
"fails":"2764",
"totalUptime":"85.32"
"tests":[
{"date":"09-24-2019 09:31","status":"Could not resolve: mailer.accenture.com (DNS server returned answer with no data)","responseTime":"0.000","dnsTime":"0.000","connectTime":"0.000","redirectTime":"0.000","firstbyteTime":"0.000","lastbyteTime":"0.000","pingLoss":"0.00","pingMin":"0.000","pingAvg":"0.000","pingMax":"0.000","size":"0","md5hash":"(null)"}
]
}
,
{
"id":"158651",
"label":"11883-GR dd-WSP",
"location":"Chicago, IL",
"targetType":"Performance transaction",
"frequency":"15",
"fails":"5919",
"totalUptime":"35.14"
,"tests":[
{"date":"09-24-2019 09:26","status":"Keywords not found - Working","responseTime":"0.669","stepresults":[
{"stepid":"1","date":"09-24-2019 09:26","status":"OK","responseTime":"0.453","dnsTime":"0.000","connectTime":"0.025","redirectTime":"0.264","firstbyteTime":"0.141","lastbyteTime":"0.024","size":"22351","md5hash":"ca002cf662980511a9faa88286f2ee96"},
{"stepid":"2","date":"09-24-2019 09:26","status":"Keywords not found - Working","responseTime":"0.216","dnsTime":"0.000","connectTime":"0.023","redirectTime":"0.000","firstbyteTime":"0.171","lastbyteTime":"0.022","size":"22457","md5hash":"38327404e4f2392979aa7dfa27118f4e"}
]}]
}
This is a small chunk of data from the response , as you could see "totalUptime":"85.32" doesn't have a comma separating it.
could you please let me know how can we load the data into python object even though the json is deformed
Deformed JSON is not JSON, so obviously you can't load it with a standard procedure. There are only two possibilities to load it:
Create your own parser
Modify the input to conform to the JSON standard
Both possibilities need you to define what format do you want to import. If it is OK for your format not to have commas then you have to define what your delimiters are.
From the example you posted is difficult to make any definitive assessment about how the input format is defined. So you probably will have to write a rudimentary parser and approximate it by try and error to the input you are trying to parse.
When I insert an object into CosmosDB (MongoDB API), the result contains a property insertedIds.
When I console.log(insertedIds) I get
[ 5a6c46c85ac3cc4bb01ebcbb,
5a6c46c85ac3cc4bb01ebcbc,
5a6c46c85ac3cc4bb01ebcbd ]
and the typeof() is an object, for each element, although I'm not sure why - they just seem to be strings.
When I go through and JSON.stringify each element, I get (with surrounding double quotes) "5a6c46c85ac3cc4bb01ebcbb","5a6c46c85ac3cc4bb01ebcbc","5a6c46c85ac3cc4bb01ebcbd"
What is the right way to parse a CosmosDB Insert Result, and get the insertedIds as an array of strings?
Do I really have to go through and "stringify" then "de-string by removing quotes" for each returned Id? That is a huge overhead with large arrays.
Note: I believe this has something to do with MongoDB's bson/strict json: https://docs.mongodb.com/manual/reference/mongodb-extended-json/ but still not sure how to parse it.
you could use the following example:
JSON.parse(this_is_double_quoted);
JSON.parse("House");
.parse would return the value without quotes. more information can be found in the following post: remove double quotes from Json return data using Jquery
I'm using json plugin to get the response in json.
But I m getting the unwanted result:
Here is what I get:
{"data":"[[\"service\",\"webservices\",\"document\"],[\"validation\",\"adapters\",\"server\"]]","records":25,"recordsTotal":75}
originally the data var in my action class is like this:
[["service","webservices","document"],["validation","adapters","server"]]
but json plugin adds the backslash.
The wanted result is that:
{"data":[["service","webservices","document"],["validation","adapters","server"]],"records":25,"recordsTotal":75}
Is there a way to get the later result ?
Thanks
You're representing the data as a PHP string. " is obviously a reserved character in JSON, so your serialization library is dutifully escaping the quote using /.
If you set up the PHP variable so it's an array of arrays, instead of a string representing an array of arrays, then your JSON serialization will work fine.
I'm working with Scala in IntelliJ IDEA 15 and trying to parse a large twitter record json file and count the total number of hashtags. I am very new to Scala and the idea of functional programming. Each line in the json file is a json object (representing a tweet). Each line in the file starts like so:
{"in_reply_to_status_id":null,"text":"To my followers sorry..
{"in_reply_to_status_id":null,"text":"#victory","in_reply_to_screen_name"..
{"in_reply_to_status_id":null,"text":"I'm so full I can't move"..
I am most interested in a property called "entities" which contains a property called "hastags" with a list of hashtags. Here is an example:
"entities":{"hashtags":[{"text":"thewayiseeit","indices":[0,13]}],"user_mentions":[],"urls":[]},
I've browsed the various scala frameworks for parsing json and have decided to use json4s. I have the following code in my Scala script.
import org.json4s.native.JsonMethods._
var json: String = ""
for (line <- io.Source.fromFile("twitter38.json").getLines) json += line
val data = parse(json)
My logic here is that I am trying to read each line from twitter38.json into a string and then parse the entire string with parse(). The parse function is throwing an error claiming:
"Type mismatch, expected: Nothing, found:String."
I have seen examples that use parse() on strings that hold json objects such as
val jsontest =
"""{
|"name" : "bob",
|"age" : "50",
|"gender" : "male"
|}
""".stripMargin
val data = parse(jsontest)
but I have received the same error. I am coming from an object oriented programming background, is there something fundamentally wrong with the way I am approaching this problem?
You have most likely incorrectly imported dependencies to your Intellij project or modules into your file. Make sure you have the following lines imported:
import org.json4s.native.JsonMethods._
Even if you correctly import this module, parse(String: json) will not work for you, because you have incorrectly formed a json. Your json String will look like this:
"""{"in_reply_...":"someValue1"}{"in_reply_...":"someValues2"}"""
but should look as follows to be a valid json that can be parsed:
"""{{"in_reply_...":"someValue1"},{"in_reply_...":"someValues2"}}"""
i.e. you need starting and ending brackets for the json, and a comma between each line of tweets. Please read the json4s documenation for more information.
Although being almost 6 years old, I think this question deserves another try.
JSON format has a few misunderstandings in people's minds, especially how they are stored and how they are read back.
JSON documents, are stored as either a single object having all the other fields, or an array of multiple object possibly in same format. this second part is important because arrays in almost every programming language are defined by angle brackets and values separated by commas (note here I used a person object as my single value):
[
{"name":"John","surname":"Doe"},
{"name":"Jane","surname":"Doe"}
]
also note that everything except brackets, numbers and booleans are enclosed in quotes when written into file.
however, there is another use that is not official but preferred to transfer datasets easily where every object, or document as in nosql/mongo language, are stored in a new line like this:
{"name":"John","surname":"Doe"}
{"name":"Jane","surname":"Doe"}
so for the question, OP has a document written in this second form, but tries an algorithm written to read the first form. following code has few simple changes to achieve this, and the user must read the file knowing that:
var json: String = "["
for (line <- io.Source.fromFile("twitter38.json").getLines) json += line + ","
json=json.splitAt(json.length()-1)._1
json+= "]"
val data = parse(json)
PS: although #sbrannon, has the correct idea, the example he/she gave has mistakenly curly braces instead of angle brackets to surround the data.
EDIT: I have added json=json.splitAt(json.length()-1)._1 because the code above ends with a trailing comma which will cause parse error per the JSON format definition.