Using two ArangoSearch Views in a traversal - arangodb

Question

Consider the following dataset:
arangosh> db.createDocumentCollection('city')
arangosh> db.createDocumentCollection('colour')
arangosh> db._createEdgeCollection('likes')
LET cities =
[
{
"key": "1",
"cities": ["toronto", "kingston"]
},
{
"key": "2",
"cities": ["seattle", "kingston"]
},
{
"key": "3",
"cities": ["seat", "kingston"]
},
{
"key": "4",
"cities": ["toronto", "seattle"]
}
]
FOR c IN cities
INSERT c INTO city
RETURN NEW
LET colours = [
{
"key": "1",
"colors": ["red", "love green"]
},
{
"key": "2",
"colors": ["we like red", "blue and purple"]
},
{
"key": "3",
"colors": ["grassy green"]
},
{
"key": "4",
"colors": ["red"]
},
{
"key": "5",
"colors": ["red"]
},
{
"key": "6",
"colors": ["red", "green"]
}
]
FOR c IN colours
INSERT c INTO colour
RETURN NEW
LET likes = [
{
"from": "city/1", "to": "colour/3"
},
{
"from": "city/1", "to": "colour/1"
},
{
"from": "city/2", "to": "colour/3"
},
{
"from": "city/3", "to": "colour/2"
},
{
"from": "city/3", "to": "colour/3"
},
{
"from": "city/3", "to": "colour/5"
},
{
"from": "city/4", "to": "colour/5"
},
{
"from": "city/4", "to": "colour/6"
}
]
FOR l IN likes
INSERT l INTO likes
RETURN NEW
arangosh> db._createView("city_v", "arangosearch");
arangosh> var link = {
includeAllFields: false,
fields : { cities : { analyzers : [ "text_en" ] } }
};
arangosh> db._view("city_v").properties({ links: { city: link }});
arangosh> db._createView("colour_v", "arangosearch");
arangosh> var link = {
includeAllFields: false,
fields : { colors : { analyzers : [ "text_en" ] } }
};
arangosh> db._view("colour_v").properties({ links: { colour: link }});
FOR p IN city_v SEARCH ANALYZER (p.cities == 'toronto', 'text_en') RETURn p._id returns
[
"city/1",
"city/4"
]
FOR p IN colour_v SEARCH ANALYZER (p.colors == 'green', 'text_en') RETURn p._id returns
[
"colour/1",
"colour/3",
"colour/6"
]
I need help with writing a query that would return the city and colour combinations where city satisfies the ArangoSearchView of toronto that like colours that satisfy the ArangoSearchView of green.
The result sould be: city/1 —> colour/3 and city/1 —> city/1 and city/4 —> city/6
While I understand that this example could use a FULLTEXT index or some other FILTER mechanism, the goal is to use the search features of ArangoSearch Views to accomplish this.

Answer 1

Would you slightly change your model like this:
LET cities =
[
{
"_key": "1",
"cities": ["toronto", "kingston"]
},
{
"_key": "2",
"cities": ["seattle", "kingston"]
},
{
"_key": "3",
"cities": ["seat", "kingston"]
},
{
"_key": "4",
"cities": ["toronto", "seattle"]
}
]
FOR c IN cities
INSERT c INTO city
RETURN NEW
LET colours = [
{
"_key": "1",
"colors": ["red", "love green"]
},
{
"_key": "2",
"colors": ["we like red", "blue and purple"]
},
{
"_key": "3",
"colors": ["grassy green"]
},
{
"_key": "4",
"colors": ["red"]
},
{
"_key": "5",
"colors": ["red"]
},
{
"_key": "6",
"colors": ["red", "green"]
}
]
FOR c IN colours
INSERT c INTO colour
RETURN NEW
LET likes = [
{
"_from": "city/1", "_to": "colour/3"
},
{
"_from": "city/1", "_to": "colour/1"
},
{
"_from": "city/2", "_to": "colour/3"
},
{
"_from": "city/3", "_to": "colour/2"
},
{
"_from": "city/3", "_to": "colour/3"
},
{
"_from": "city/3", "_to": "colour/5"
},
{
"_from": "city/4", "_to": "colour/5"
},
{
"_from": "city/4", "_to": "colour/6"
}
]
FOR l IN likes
INSERT l INTO likes
RETURN NEW
And run the query below:
LET clr = (FOR p IN colour_v SEARCH ANALYZER (p.colors == 'green', 'text_en') RETURN p)
FOR doc IN city_v SEARCH ANALYZER (doc.cities == 'toronto', 'text_en')
FOR v,e,p in 1..1 OUTBOUND doc likes
filter p.vertices[1] in clr
RETURN {"v":v,"e":e,"p":p}