Django “LIKE” query for JSONField
I have created model like this:
class Customer(models.Model):
name = models.CharField(max_length=200)
data = JSONField()
and data filed has this structure:
Customer.objects.create(name='David', data=
fields: [
id: 1, value: "abc",
id: 2, value: "efg
]
)
If we filter objects with exact data.fields.item, we can do like this:
Customer.obejcts.filter(data__fields__contains=[id: 1, value: "abc"])
If we want to filter objects with data.fields.item but with not exact data.fields.item.value as follows, how can we do this? Thanks very much!
Customer.obejcts.filter(data__fields__contains=[id: 1, value: "b"])
For raw sql in PostgreSQL, maybe we can do as follows:
SELECT id, json_string(fields,'value') FROM table_name
WHERE json_string(fields,'value') LIKE '%b%';
And try the following django statement, but it doesn't work:
queryset = Customer.objects
.annotate(fieldValue=KeyTextTransform('value', 'fields'))
.filter(fieldValue__contains='b')
python django postgresql django-queryset
edited Dec 9 at 8:21
Sherpa
1,017814
asked Nov 11 at 16:35
Zihe Liu
11
add a comment |
I have created model like this:
class Customer(models.Model):
name = models.CharField(max_length=200)
data = JSONField()
and data filed has this structure:
Customer.objects.create(name='David', data=
fields: [
id: 1, value: "abc",
id: 2, value: "efg
]
)
If we filter objects with exact data.fields.item, we can do like this:
Customer.obejcts.filter(data__fields__contains=[id: 1, value: "abc"])
If we want to filter objects with data.fields.item but with not exact data.fields.item.value as follows, how can we do this? Thanks very much!
Customer.obejcts.filter(data__fields__contains=[id: 1, value: "b"])
For raw sql in PostgreSQL, maybe we can do as follows:
SELECT id, json_string(fields,'value') FROM table_name
WHERE json_string(fields,'value') LIKE '%b%';
And try the following django statement, but it doesn't work:
queryset = Customer.objects
.annotate(fieldValue=KeyTextTransform('value', 'fields'))
.filter(fieldValue__contains='b')
python django postgresql django-queryset
edited Dec 9 at 8:21
Sherpa
1,017814
asked Nov 11 at 16:35
Zihe Liu
11
Is this a PostgreSQL database? Most other database systems can not "look into" JSON objects.
– Willem Van Onsem
Nov 11 at 16:36
Yes, this is a PostgreSQL database.
– Zihe Liu
Nov 11 at 16:37
I try to use KeyTextTransform, but it doesn't work. What I should do to fix it? Thanks very much.
– Zihe Liu
Nov 11 at 17:56
add a comment |
I have created model like this:
class Customer(models.Model):
name = models.CharField(max_length=200)
data = JSONField()
and data filed has this structure:
Customer.objects.create(name='David', data=
fields: [
id: 1, value: "abc",
id: 2, value: "efg
]
)
If we filter objects with exact data.fields.item, we can do like this:
Customer.obejcts.filter(data__fields__contains=[id: 1, value: "abc"])
If we want to filter objects with data.fields.item but with not exact data.fields.item.value as follows, how can we do this? Thanks very much!
Customer.obejcts.filter(data__fields__contains=[id: 1, value: "b"])
For raw sql in PostgreSQL, maybe we can do as follows:
SELECT id, json_string(fields,'value') FROM table_name
WHERE json_string(fields,'value') LIKE '%b%';
And try the following django statement, but it doesn't work:
queryset = Customer.objects
.annotate(fieldValue=KeyTextTransform('value', 'fields'))
.filter(fieldValue__contains='b')
python django postgresql django-queryset
edited Dec 9 at 8:21
Sherpa
1,017814
asked Nov 11 at 16:35
Zihe Liu
11
I have created model like this:
class Customer(models.Model):
name = models.CharField(max_length=200)
data = JSONField()
and data filed has this structure:
Customer.objects.create(name='David', data=
fields: [
id: 1, value: "abc",
id: 2, value: "efg
]
)
If we filter objects with exact data.fields.item, we can do like this:
Customer.obejcts.filter(data__fields__contains=[id: 1, value: "abc"])
If we want to filter objects with data.fields.item but with not exact data.fields.item.value as follows, how can we do this? Thanks very much!
Customer.obejcts.filter(data__fields__contains=[id: 1, value: "b"])
For raw sql in PostgreSQL, maybe we can do as follows:
SELECT id, json_string(fields,'value') FROM table_name
WHERE json_string(fields,'value') LIKE '%b%';
And try the following django statement, but it doesn't work:
queryset = Customer.objects
.annotate(fieldValue=KeyTextTransform('value', 'fields'))
.filter(fieldValue__contains='b')
python django postgresql django-queryset
python django postgresql django-queryset
edited Dec 9 at 8:21
Sherpa
1,017814
asked Nov 11 at 16:35
Zihe Liu
11
edited Dec 9 at 8:21
Sherpa
1,017814
asked Nov 11 at 16:35
Zihe Liu
11
edited Dec 9 at 8:21
Sherpa
1,017814
edited Dec 9 at 8:21
Sherpa
1,017814
edited Dec 9 at 8:21
Sherpa
1,017814
1,017814
asked Nov 11 at 16:35
Zihe Liu
11
asked Nov 11 at 16:35
Zihe Liu
11
asked Nov 11 at 16:35
Zihe Liu
11
11
Is this a PostgreSQL database? Most other database systems can not "look into" JSON objects.
– Willem Van Onsem
Nov 11 at 16:36
Yes, this is a PostgreSQL database.
– Zihe Liu
Nov 11 at 16:37
I try to use KeyTextTransform, but it doesn't work. What I should do to fix it? Thanks very much.
– Zihe Liu
Nov 11 at 17:56
add a comment |
Is this a PostgreSQL database? Most other database systems can not "look into" JSON objects.
– Willem Van Onsem
Nov 11 at 16:36
Yes, this is a PostgreSQL database.
– Zihe Liu
Nov 11 at 16:37
I try to use KeyTextTransform, but it doesn't work. What I should do to fix it? Thanks very much.
– Zihe Liu
Nov 11 at 17:56
Is this a PostgreSQL database? Most other database systems can not "look into" JSON objects.
– Willem Van Onsem
Nov 11 at 16:36
Is this a PostgreSQL database? Most other database systems can not "look into" JSON objects.
– Willem Van Onsem
Nov 11 at 16:36
Yes, this is a PostgreSQL database.
– Zihe Liu
Nov 11 at 16:37
Yes, this is a PostgreSQL database.
– Zihe Liu
Nov 11 at 16:37
I try to use KeyTextTransform, but it doesn't work. What I should do to fix it? Thanks very much.
– Zihe Liu
Nov 11 at 17:56
I try to use KeyTextTransform, but it doesn't work. What I should do to fix it? Thanks very much.
– Zihe Liu
Nov 11 at 17:56
add a comment |
1 Answer
1
active
oldest
votes
Emm, I try a raw sql solution with json_array_elements and it works.
def search_like(field):
return Customer.objects.raw("""
SELECT *
FROM customer t, json_array_elements(t.fields::json) AS elem
WHERE elem->>'id' = '' AND elem->>'value' LIKE '%%%%'
""".format(field['id'], field['value']))
search('id': 1,'value': 'b')
Does anyone have better solution without raw sql?
answered Nov 11 at 19:03
Zihe Liu
11
add a comment |
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1 Answer
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active
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votes
1 Answer
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active
oldest
votes
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oldest
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oldest
votes
Emm, I try a raw sql solution with json_array_elements and it works.
def search_like(field):
return Customer.objects.raw("""
SELECT *
FROM customer t, json_array_elements(t.fields::json) AS elem
WHERE elem->>'id' = '' AND elem->>'value' LIKE '%%%%'
""".format(field['id'], field['value']))
search('id': 1,'value': 'b')
Does anyone have better solution without raw sql?
answered Nov 11 at 19:03
Zihe Liu
11
add a comment |
Emm, I try a raw sql solution with json_array_elements and it works.
def search_like(field):
return Customer.objects.raw("""
SELECT *
FROM customer t, json_array_elements(t.fields::json) AS elem
WHERE elem->>'id' = '' AND elem->>'value' LIKE '%%%%'
""".format(field['id'], field['value']))
search('id': 1,'value': 'b')
Does anyone have better solution without raw sql?
answered Nov 11 at 19:03
Zihe Liu
11
add a comment |
Emm, I try a raw sql solution with json_array_elements and it works.
def search_like(field):
return Customer.objects.raw("""
SELECT *
FROM customer t, json_array_elements(t.fields::json) AS elem
WHERE elem->>'id' = '' AND elem->>'value' LIKE '%%%%'
""".format(field['id'], field['value']))
search('id': 1,'value': 'b')
Does anyone have better solution without raw sql?
answered Nov 11 at 19:03
Zihe Liu
11
Emm, I try a raw sql solution with json_array_elements and it works.
def search_like(field):
return Customer.objects.raw("""
SELECT *
FROM customer t, json_array_elements(t.fields::json) AS elem
WHERE elem->>'id' = '' AND elem->>'value' LIKE '%%%%'
""".format(field['id'], field['value']))
search('id': 1,'value': 'b')
Does anyone have better solution without raw sql?
answered Nov 11 at 19:03
Zihe Liu
11
answered Nov 11 at 19:03
Zihe Liu
11
answered Nov 11 at 19:03
Zihe Liu
11
answered Nov 11 at 19:03
Zihe Liu
11
11
add a comment |
add a comment |
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Is this a PostgreSQL database? Most other database systems can not "look into" JSON objects.
– Willem Van Onsem
Nov 11 at 16:36
Yes, this is a PostgreSQL database.
– Zihe Liu
Nov 11 at 16:37
I try to use KeyTextTransform, but it doesn't work. What I should do to fix it? Thanks very much.
– Zihe Liu
Nov 11 at 17:56