Query JSON in Postgres - json

Question

I have some JSON in my postgres DB, it's in a table called site_content, the table has two rows, id and content, in content is where I store my JSON. I want to be able to find the a player given his id, my players are stored under the key series as this is the key needed to create my charts from JSON.
Here is the query I am currently using:
Blocking.get {
sql.firstRow("""SELECT * from site_content where content -> 'playersContainer' -> 'series' -> 'id' = ${id} """)
}.map { row ->
log.info("row is: ${row}")
if (row) {
objectMapper.readValue(row.getAt(0).toString(), Player)
}
}
}
However I get back this error:
org.postgresql.util.PSQLException: ERROR: operator does not exist:
json = character varying Hint: No operator matches the given name
and argument type(s). You might need to add explicit type casts.
Here is an example of my JSON:
"id": "${ID}",
"team": {
"id": "123",
"name": "Shire Soldiers"
},
"playersContainer": {
"series": [
{
"id": "1",
"name": "Nick",
"teamName": "Shire Soldiers",
"ratings": [
1,
5,
6,
9
],
"assists": 17,
"manOfTheMatches": 20,
"cleanSheets": 1,
"data": [
3,
2,
3,
5,
6
],
"totalGoals": 19
},
{
"id": "2",
"name": "Pasty",
"teamName": "Shire Soldiers",
"ratings": [
6,
8,
9,
10
],
"assists": 25,
"manOfTheMatches": 32,
"cleanSheets": 2,
"data": [
3,
5,
7,
9,
10
],
"totalGoals": 24
}
]
}
I am using Groovy for this project, but I guess it's just the general JSON postgres syntax I am having problems with.

Answer 1

You're right, that's a problem with SQL syntax. Correct you query:
select * from json_test where content->'playersContainer'->'series' #> '[{"id":"1"}]';
Full example:
CREATE TABLE json_test (
content jsonb
);
insert into json_test(content) VALUES ('{"id": "1",
"team": {
"id": "123",
"name": "Shire Soldiers"
},
"playersContainer": {
"series": [
{
"id": "1",
"name": "Nick",
"teamName": "Shire Soldiers",
"ratings": [
1,
5,
6,
9
],
"assists": 17,
"manOfTheMatches": 20,
"cleanSheets": 1,
"data": [
3,
2,
3,
5,
6
],
"totalGoals": 19
},
{
"id": "2",
"name": "Pasty",
"teamName": "Shire Soldiers",
"ratings": [
6,
8,
9,
10
],
"assists": 25,
"manOfTheMatches": 32,
"cleanSheets": 2,
"data": [
3,
5,
7,
9,
10
],
"totalGoals": 24
}
]
}}');
select * from json_test where content->'playersContainer'->'series' #> '[{"id":"1"}]';
About #> operator. This question might be also useful.

Answer 2

May be it could help: Into the sql statement, I added this 'cast' where I have the json field:
INSERT INTO map_file(type, data)
VALUES (?, CAST(? AS json))
RETURNING id
the datatype of 'data' into map_file table is: json