How to parse unnest json data using cypher query language to neo4j database? - json

Question

In the below json file I want to access "934934507945312256", "934934503604174848",.... and then the keys inside them.
But after using UNWIND clause I am unable to access the data of these keys(quote_count,reply_count,etc.) as these keys("934934507945312256" ,"934934503604174848",...) are randomly generated.
{
"934934507945312256": {
"quote_count": 0,
"reply_count": 0,
"hashtags": null,
"datetime": "2017-11-26 23:58:51",
"date": "2017-11-26",
"like_count": 0,
"verified": "False",
"sentiment": 0,
"author": "Judy💯The Resistance",
"location": "Hollywood, California USA🇺🇸",
"tid": "934934507945312256",
"retweet_count": 0,
"type": "retweet",
"media_list": null,
"quoted_source_id": null,
"url_list": null,
"tweet_text": "RT #kylegriffin1: Reminder: The Senate Judiciary Committee gave Jared Kushner a November 27 deadline to turn over the missing records… ",
"author_profile_image": "https://pbs.twimg.com/profi...",
"author_screen_name": "jgirl66",
"author_id": "23737528",
"lang": "en",
"keywords_processed_list": [
"reminder",
"senate judiciary committee",
"kushner november",
"deadline"
],
"retweet_source_id": "934872065471115264",
"mentions": [
"kylegriffin1"
],
"replyto_source_id": null
},
"934934503604174848": {
"quote_count": 0,
"reply_count": 2,
"hashtags": [
"MissUniverse",
"Thailand"
],
"datetime": "2017-11-26 23:58:50",
"date": "2017-11-26",
"like_count": 38,
"verified": "False",
"sentiment": 0,
"author": "P'Hmee7.5",
"location": "Bangkok, Thailand",
"tid": "934934503604174848",
"retweet_count": 105,
"type": "Tweet",
"media_list": null,
"quoted_source_id": null,
"url_list": null,
"tweet_text": "รอโหวต มรญ #MissUniverse #Thailand",
"author_profile_image": "
Thumbnail
",
"author_screen_name": "Peehmee75",
"author_id": "700720806972624897",
"lang": "th",
"keywords_processed_list": null,
"retweet_source_id": null,
"mentions": null,
"replyto_source_id": null
},
"934934336381636608": {
"quote_count": 0,
"reply_count": 0,
"hashtags": null,
"datetime": "2017-11-26 23:58:10",
"date": "2017-11-26",
"like_count": 0,
"verified": "False",
"sentiment": 0,
"author": "selfresqingprncess",
"location": "Maine, USA",
"tid": "934934336381636608",
"retweet_count": 0,
"type": "retweet",
"media_list": null,
"quoted_source_id": null,
"url_list": null,
"tweet_text": "RT #kylegriffin1: Reminder: The Senate Judiciary Committee gave Jared Kushner a November 27 deadline to turn over the missing records… ",
"author_profile_image": "https://pbs.twimg.com/profi...",
"author_screen_name": "slfresqngprncss",
"author_id": "100536014",
"lang": "en",
"keywords_processed_list": [
"reminder",
"keywords_processed_list": [
"reminder",
"senate judiciary committee",
"kushner november",
"deadline"
],
"retweet_source_id": "934872065471115264",
"mentions": [
"kylegriffin1"
],
"replyto_source_id": null
}
}
There's I have tried :-
query = """
with {json} as data UNWIND data as doc FOREACH( l in doc| MERGE (label1:Label1 {author:l.author}))
"""
But I am getting error:- Cannot merge node using null property value for author.

Answer 1

Your JSON file is malformed.
A JSON string cannot contain control characters (like carriage returns or linefeeds). And your JSON contains an extraneous section (that is probably a copy/paste error):
"keywords_processed_list": [
"reminder",
Furthermore, UNWIND can only be used with lists. You cannot use it to get the properties from a map. Once you have fixed your JSON errors, try the following query (I assume that json is a parameter whose value is your JSON data):
UNWIND KEYS($json) AS k
MERGE(label1:Label1 {author: $json[k].author})