Query in nested objects
have follow graph
CREATE (s1:SOME {id:'s1'} )
CREATE (s2:SOME {id:'s2'} )
CREATE (a11:ANOTHER {id:'a11', tags:["tag1", "tag2"] } )
CREATE (a12:ANOTHER {id:'a12', tags:["tag2", "tag3"] } )
CREATE (a21:ANOTHER {id:'a21', tags:["tag3", "tag4"] } )
CREATE (a22:ANOTHER {id:'a22', tags:["tag4", "tag5"] } )
CREATE (s1)-[:CONTAINS ]->(a11),
(s1)-[:CONTAINS ]->(a12),
(s2)-[:CONTAINS ]->(a21),
(s2)-[:CONTAINS ]->(a22)
and populate records it with follow query:
match (s:SOME)
with s
OPTIONAL MATCH (a:ANOTHER)-[r:CONTAINS]-(s)
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
now I want to add some restrictions on ANOTHER.tags field:
match (s:SOME)
with s
OPTIONAL MATCH (a:ANOTHER)-[r:CONTAINS]-(s)
where 'tag2' in a.tags
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
result:
╒══════╤══════════════════════════════════════════════════════════════════════╕
│"s.id"│"aa" │
╞══════╪══════════════════════════════════════════════════════════════════════╡
│"s2" │ │
├──────┼──────────────────────────────────────────────────────────────────────┤
│"s1" │[{"id":"a11","tags":["tag1","tag2"]},{"id":"a12","tags":["tag2","tag3"│
│ │]}] │
└──────┴──────────────────────────────────────────────────────────────────────┘
But I want to skip s2 record at all, since it not contains required tag
another thing - what If I want to check multiple tags ? like ["tag1", "tag2"] (should respond with empty data in this case ) can I use something like intersection?
neo4j cypher
asked Nov 22 '18 at 16:49
Alexander PopovAlexander Popov
12711
add a comment |
have follow graph
CREATE (s1:SOME {id:'s1'} )
CREATE (s2:SOME {id:'s2'} )
CREATE (a11:ANOTHER {id:'a11', tags:["tag1", "tag2"] } )
CREATE (a12:ANOTHER {id:'a12', tags:["tag2", "tag3"] } )
CREATE (a21:ANOTHER {id:'a21', tags:["tag3", "tag4"] } )
CREATE (a22:ANOTHER {id:'a22', tags:["tag4", "tag5"] } )
CREATE (s1)-[:CONTAINS ]->(a11),
(s1)-[:CONTAINS ]->(a12),
(s2)-[:CONTAINS ]->(a21),
(s2)-[:CONTAINS ]->(a22)
and populate records it with follow query:
match (s:SOME)
with s
OPTIONAL MATCH (a:ANOTHER)-[r:CONTAINS]-(s)
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
now I want to add some restrictions on ANOTHER.tags field:
match (s:SOME)
with s
OPTIONAL MATCH (a:ANOTHER)-[r:CONTAINS]-(s)
where 'tag2' in a.tags
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
result:
╒══════╤══════════════════════════════════════════════════════════════════════╕
│"s.id"│"aa" │
╞══════╪══════════════════════════════════════════════════════════════════════╡
│"s2" │ │
├──────┼──────────────────────────────────────────────────────────────────────┤
│"s1" │[{"id":"a11","tags":["tag1","tag2"]},{"id":"a12","tags":["tag2","tag3"│
│ │]}] │
└──────┴──────────────────────────────────────────────────────────────────────┘
But I want to skip s2 record at all, since it not contains required tag
another thing - what If I want to check multiple tags ? like ["tag1", "tag2"] (should respond with empty data in this case ) can I use something like intersection?
neo4j cypher
asked Nov 22 '18 at 16:49
Alexander PopovAlexander Popov
12711
Does the following snippet work for you?WITH aa WHERE size(aa) > 0orWITH DISTINCT a WHERE a IS NOT NULL, alternatively have a look at the filter function [neo4j.com/docs/developer-manual/3.4/cypher/functions/list/….
– ThirstForKnowledge
Nov 22 '18 at 18:08
add a comment |
have follow graph
CREATE (s1:SOME {id:'s1'} )
CREATE (s2:SOME {id:'s2'} )
CREATE (a11:ANOTHER {id:'a11', tags:["tag1", "tag2"] } )
CREATE (a12:ANOTHER {id:'a12', tags:["tag2", "tag3"] } )
CREATE (a21:ANOTHER {id:'a21', tags:["tag3", "tag4"] } )
CREATE (a22:ANOTHER {id:'a22', tags:["tag4", "tag5"] } )
CREATE (s1)-[:CONTAINS ]->(a11),
(s1)-[:CONTAINS ]->(a12),
(s2)-[:CONTAINS ]->(a21),
(s2)-[:CONTAINS ]->(a22)
and populate records it with follow query:
match (s:SOME)
with s
OPTIONAL MATCH (a:ANOTHER)-[r:CONTAINS]-(s)
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
now I want to add some restrictions on ANOTHER.tags field:
match (s:SOME)
with s
OPTIONAL MATCH (a:ANOTHER)-[r:CONTAINS]-(s)
where 'tag2' in a.tags
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
result:
╒══════╤══════════════════════════════════════════════════════════════════════╕
│"s.id"│"aa" │
╞══════╪══════════════════════════════════════════════════════════════════════╡
│"s2" │ │
├──────┼──────────────────────────────────────────────────────────────────────┤
│"s1" │[{"id":"a11","tags":["tag1","tag2"]},{"id":"a12","tags":["tag2","tag3"│
│ │]}] │
└──────┴──────────────────────────────────────────────────────────────────────┘
But I want to skip s2 record at all, since it not contains required tag
another thing - what If I want to check multiple tags ? like ["tag1", "tag2"] (should respond with empty data in this case ) can I use something like intersection?
neo4j cypher
asked Nov 22 '18 at 16:49
Alexander PopovAlexander Popov
12711
have follow graph
CREATE (s1:SOME {id:'s1'} )
CREATE (s2:SOME {id:'s2'} )
CREATE (a11:ANOTHER {id:'a11', tags:["tag1", "tag2"] } )
CREATE (a12:ANOTHER {id:'a12', tags:["tag2", "tag3"] } )
CREATE (a21:ANOTHER {id:'a21', tags:["tag3", "tag4"] } )
CREATE (a22:ANOTHER {id:'a22', tags:["tag4", "tag5"] } )
CREATE (s1)-[:CONTAINS ]->(a11),
(s1)-[:CONTAINS ]->(a12),
(s2)-[:CONTAINS ]->(a21),
(s2)-[:CONTAINS ]->(a22)
and populate records it with follow query:
match (s:SOME)
with s
OPTIONAL MATCH (a:ANOTHER)-[r:CONTAINS]-(s)
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
now I want to add some restrictions on ANOTHER.tags field:
match (s:SOME)
with s
OPTIONAL MATCH (a:ANOTHER)-[r:CONTAINS]-(s)
where 'tag2' in a.tags
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
result:
╒══════╤══════════════════════════════════════════════════════════════════════╕
│"s.id"│"aa" │
╞══════╪══════════════════════════════════════════════════════════════════════╡
│"s2" │ │
├──────┼──────────────────────────────────────────────────────────────────────┤
│"s1" │[{"id":"a11","tags":["tag1","tag2"]},{"id":"a12","tags":["tag2","tag3"│
│ │]}] │
└──────┴──────────────────────────────────────────────────────────────────────┘
But I want to skip s2 record at all, since it not contains required tag
another thing - what If I want to check multiple tags ? like ["tag1", "tag2"] (should respond with empty data in this case ) can I use something like intersection?
neo4j cypher
neo4j cypher
asked Nov 22 '18 at 16:49
Alexander PopovAlexander Popov
12711
asked Nov 22 '18 at 16:49
Alexander PopovAlexander Popov
12711
asked Nov 22 '18 at 16:49
Alexander PopovAlexander Popov
12711
asked Nov 22 '18 at 16:49
Alexander PopovAlexander Popov
12711
asked Nov 22 '18 at 16:49
Alexander PopovAlexander Popov
12711
12711
Does the following snippet work for you?WITH aa WHERE size(aa) > 0orWITH DISTINCT a WHERE a IS NOT NULL, alternatively have a look at the filter function [neo4j.com/docs/developer-manual/3.4/cypher/functions/list/….
– ThirstForKnowledge
Nov 22 '18 at 18:08
add a comment |
Does the following snippet work for you?WITH aa WHERE size(aa) > 0orWITH DISTINCT a WHERE a IS NOT NULL, alternatively have a look at the filter function [neo4j.com/docs/developer-manual/3.4/cypher/functions/list/….
– ThirstForKnowledge
Nov 22 '18 at 18:08
Does the following snippet work for you?
WITH aa WHERE size(aa) > 0 or WITH DISTINCT a WHERE a IS NOT NULL, alternatively have a look at the filter function [neo4j.com/docs/developer-manual/3.4/cypher/functions/list/….– ThirstForKnowledge
Nov 22 '18 at 18:08
Does the following snippet work for you?
WITH aa WHERE size(aa) > 0 or WITH DISTINCT a WHERE a IS NOT NULL, alternatively have a look at the filter function [neo4j.com/docs/developer-manual/3.4/cypher/functions/list/….– ThirstForKnowledge
Nov 22 '18 at 18:08
add a comment |
1 Answer
1
active
oldest
votes
You just have to switch from OPTIONAL MATCH to MATCH only and it should skip null values.
We can also shorten the query by using only a single MATCH instead of two:
match (s:SOME)<-[r:CONTAINS]-(s)
where 'tag2' in a.tags
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
answered Nov 23 '18 at 20:01
Tomaž BrataničTomaž Bratanič
1,9002718
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You just have to switch from OPTIONAL MATCH to MATCH only and it should skip null values.
We can also shorten the query by using only a single MATCH instead of two:
match (s:SOME)<-[r:CONTAINS]-(s)
where 'tag2' in a.tags
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
answered Nov 23 '18 at 20:01
Tomaž BrataničTomaž Bratanič
1,9002718
add a comment |
You just have to switch from OPTIONAL MATCH to MATCH only and it should skip null values.
We can also shorten the query by using only a single MATCH instead of two:
match (s:SOME)<-[r:CONTAINS]-(s)
where 'tag2' in a.tags
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
answered Nov 23 '18 at 20:01
Tomaž BrataničTomaž Bratanič
1,9002718
add a comment |
You just have to switch from OPTIONAL MATCH to MATCH only and it should skip null values.
We can also shorten the query by using only a single MATCH instead of two:
match (s:SOME)<-[r:CONTAINS]-(s)
where 'tag2' in a.tags
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
answered Nov 23 '18 at 20:01
Tomaž BrataničTomaž Bratanič
1,9002718
You just have to switch from OPTIONAL MATCH to MATCH only and it should skip null values.
We can also shorten the query by using only a single MATCH instead of two:
match (s:SOME)<-[r:CONTAINS]-(s)
where 'tag2' in a.tags
WITH s, COLLECT(DISTINCT a) AS aa
return s.id, aa
answered Nov 23 '18 at 20:01
Tomaž BrataničTomaž Bratanič
1,9002718
answered Nov 23 '18 at 20:01
Tomaž BrataničTomaž Bratanič
1,9002718
answered Nov 23 '18 at 20:01
Tomaž BrataničTomaž Bratanič
1,9002718
answered Nov 23 '18 at 20:01
Tomaž BrataničTomaž Bratanič
1,9002718
1,9002718
add a comment |
add a comment |
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Does the following snippet work for you?
WITH aa WHERE size(aa) > 0orWITH DISTINCT a WHERE a IS NOT NULL, alternatively have a look at the filter function [neo4j.com/docs/developer-manual/3.4/cypher/functions/list/….– ThirstForKnowledge
Nov 22 '18 at 18:08