1 | var params = { |
||
2 | TableName: 'test_model', |
||
3 | KeySchema: [ // The type of of schema. Must start with a HASH type, with an optional second RANGE. |
||
4 | { // Required HASH type attribute |
||
5 | AttributeName: 'id', |
||
6 | KeyType: 'HASH', |
||
7 | } |
||
8 | ], |
||
9 | AttributeDefinitions: [ // The names and types of all primary and index key attributes only |
||
10 | { |
||
11 | AttributeName: 'id', |
||
12 | AttributeType: 'S', // (S | N | B) for string, number, binary |
||
13 | }, |
||
14 | { |
||
15 | AttributeName: 'count', |
||
16 | AttributeType: 'N', // (S | N | B) for string, number, binary |
||
17 | } |
||
18 | ], |
||
19 | ProvisionedThroughput: { // required provisioned throughput for the table |
||
20 | ReadCapacityUnits: 1, |
||
21 | WriteCapacityUnits: 1, |
||
22 | }, |
||
23 | GlobalSecondaryIndexes: [ // optional (list of GlobalSecondaryIndex) |
||
24 | { |
||
25 | IndexName: 'count_index', |
||
26 | KeySchema: [ |
||
27 | { // Required HASH type attribute |
||
28 | AttributeName: 'count', |
||
29 | KeyType: 'HASH', |
||
30 | } |
||
31 | ], |
||
32 | Projection: { // attributes to project into the index |
||
33 | ProjectionType: 'ALL', // (ALL | KEYS_ONLY | INCLUDE) |
||
34 | }, |
||
35 | ProvisionedThroughput: { // throughput to provision to the index |
||
36 | ReadCapacityUnits: 1, |
||
37 | WriteCapacityUnits: 1, |
||
38 | }, |
||
39 | }, |
||
40 | // ... more global secondary indexes ... |
||
41 | ] |
||
42 | }; |
||
43 | dynamodb.createTable(params, function(err, data) { |
||
0 ignored issues
–
show
|
|||
44 | if (err) print(err); // an error occurred |
||
0 ignored issues
–
show
Curly braces around statements make for more readable code and help prevent bugs when you add further statements.
Consider adding curly braces around all statements when they are executed conditionally. This is optional if there is only one statement, but leaving them out can lead to unexpected behaviour if another statement is added later. Consider: if (a > 0)
b = 42;
If you or someone else later decides to put another statement in, only the first statement will be executed. if (a > 0)
console.log("a > 0");
b = 42;
In this case the statement if (a > 0) {
console.log("a > 0");
b = 42;
}
ensures that the proper code will be executed conditionally no matter how many statements are added or removed. ![]() |
|||
45 | else print(data); // successful response |
||
46 | }); |
||
47 | |||
48 | // Table with composite keys: |
||
49 | |||
50 | params = { |
||
51 | TableName: 'composite_test_model', |
||
52 | KeySchema: [ // The type of of schema. Must start with a HASH type, with an optional second RANGE. |
||
53 | { // Required HASH type attribute |
||
54 | AttributeName: 'id', |
||
55 | KeyType: 'HASH', |
||
56 | }, |
||
57 | { |
||
58 | AttributeName: 'id2', |
||
59 | KeyType: 'RANGE', |
||
60 | } |
||
61 | ], |
||
62 | AttributeDefinitions: [ // The names and types of all primary and index key attributes only |
||
63 | { |
||
64 | AttributeName: 'id', |
||
65 | AttributeType: 'S', // (S | N | B) for string, number, binary |
||
66 | }, |
||
67 | { |
||
68 | AttributeName: 'id2', |
||
69 | AttributeType: 'S', // (S | N | B) for string, number, binary |
||
70 | }, |
||
71 | { |
||
72 | AttributeName: 'count', |
||
73 | AttributeType: 'N', // (S | N | B) for string, number, binary |
||
74 | } |
||
75 | ], |
||
76 | ProvisionedThroughput: { // required provisioned throughput for the table |
||
77 | ReadCapacityUnits: 1, |
||
78 | WriteCapacityUnits: 1, |
||
79 | }, |
||
80 | GlobalSecondaryIndexes: [ // optional (list of GlobalSecondaryIndex) |
||
81 | { |
||
82 | IndexName: 'count_index', |
||
83 | KeySchema: [ |
||
84 | { // Required HASH type attribute |
||
85 | AttributeName: 'count', |
||
86 | KeyType: 'HASH', |
||
87 | } |
||
88 | ], |
||
89 | Projection: { // attributes to project into the index |
||
90 | ProjectionType: 'ALL', // (ALL | KEYS_ONLY | INCLUDE) |
||
91 | }, |
||
92 | ProvisionedThroughput: { // throughput to provision to the index |
||
93 | ReadCapacityUnits: 1, |
||
94 | WriteCapacityUnits: 1, |
||
95 | }, |
||
96 | }, |
||
97 | { |
||
98 | IndexName: 'id_count_index', |
||
99 | KeySchema: [ |
||
100 | { // Required HASH type attribute |
||
101 | AttributeName: 'id', |
||
102 | KeyType: 'HASH', |
||
103 | }, |
||
104 | { |
||
105 | AttributeName: 'count', |
||
106 | KeyType: 'RANGE', |
||
107 | } |
||
108 | ], |
||
109 | Projection: { // attributes to project into the index |
||
110 | ProjectionType: 'ALL', // (ALL | KEYS_ONLY | INCLUDE) |
||
111 | }, |
||
112 | ProvisionedThroughput: { // throughput to provision to the index |
||
113 | ReadCapacityUnits: 1, |
||
114 | WriteCapacityUnits: 1, |
||
115 | }, |
||
116 | }, |
||
117 | // ... more global secondary indexes ... |
||
118 | ] |
||
119 | }; |
||
120 | dynamodb.createTable(params, function(err, data) { |
||
121 | if (err) print(err); // an error occurred |
||
0 ignored issues
–
show
Curly braces around statements make for more readable code and help prevent bugs when you add further statements.
Consider adding curly braces around all statements when they are executed conditionally. This is optional if there is only one statement, but leaving them out can lead to unexpected behaviour if another statement is added later. Consider: if (a > 0)
b = 42;
If you or someone else later decides to put another statement in, only the first statement will be executed. if (a > 0)
console.log("a > 0");
b = 42;
In this case the statement if (a > 0) {
console.log("a > 0");
b = 42;
}
ensures that the proper code will be executed conditionally no matter how many statements are added or removed. ![]() |
|||
122 | else print(data); // successful response |
||
123 | }); |
||
124 |
This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed.
To learn more about declaring variables in Javascript, see the MDN.