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mdl_cohort
MIGRATEIdentity / profile / access / user extension · 11 columnsProposed target
Map to users, profiles, external_identity_links, memberships/enrolments as applicable
Migration rule
Preserve Moodle IDs in legacy_id; use immutable IdP subject for login identity
Verification required
Verify PII fields, custom profile semantics, deleted/suspended users, duplicate email and foreign keys
Tracking
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| Column | Type | Null | Default | Target mapping | Risk |
|---|---|---|---|---|---|
| id | bigint | Not null | Preserve as legacy source ID; generate target PK unless target accepts stable legacy key. | High: verify semantics/relationship/security | |
| contextid | bigint | Not null | Resolve to target foreign key via source-ID crosswalk; do not assume numeric IDs match target IDs. | High: verify semantics/relationship/security | |
| name | varchar(254) | Not null | '' | Map same-named field where semantics match; confirm target type, nullability, defaults and business meaning. | Schema-only inference |
| idnumber | varchar(100) | Nullable | Map same-named field where semantics match; confirm target type, nullability, defaults and business meaning. | Schema-only inference | |
| description | longtext | Nullable | Transform text/JSON/HTML as appropriate; sanitize and rewrite embedded Moodle URLs/file references. | Schema-only inference | |
| descriptionformat | tinyint | Not null | Transform text/JSON/HTML as appropriate; sanitize and rewrite embedded Moodle URLs/file references. | Schema-only inference | |
| visible | tinyint(1) | Not null | '1' | Map through explicit enum/boolean translation; retain source value and test edge cases. | Schema-only inference |
| component | varchar(100) | Not null | '' | Map same-named field where semantics match; confirm target type, nullability, defaults and business meaning. | Schema-only inference |
| timecreated | bigint | Not null | Convert Unix epoch to UTC timestamp; verify 0/null sentinel and date semantics. | Schema-only inference | |
| timemodified | bigint | Not null | Convert Unix epoch to UTC timestamp; verify 0/null sentinel and date semantics. | Schema-only inference | |
| theme | varchar(50) | Nullable | Map same-named field where semantics match; confirm target type, nullability, defaults and business meaning. | Schema-only inference |